/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-60729f1 [2020-11-11 14:42:50,039 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-11 14:42:50,042 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-11 14:42:50,105 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-11 14:42:50,106 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-11 14:42:50,108 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-11 14:42:50,110 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-11 14:42:50,112 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-11 14:42:50,115 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-11 14:42:50,119 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-11 14:42:50,120 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-11 14:42:50,122 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-11 14:42:50,122 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-11 14:42:50,124 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-11 14:42:50,125 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-11 14:42:50,127 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-11 14:42:50,128 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-11 14:42:50,129 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-11 14:42:50,132 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-11 14:42:50,135 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-11 14:42:50,137 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-11 14:42:50,144 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-11 14:42:50,146 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-11 14:42:50,147 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-11 14:42:50,151 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-11 14:42:50,160 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-11 14:42:50,162 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-11 14:42:50,165 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-11 14:42:50,170 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-11 14:42:50,172 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-11 14:42:50,172 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-11 14:42:50,173 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-11 14:42:50,173 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-11 14:42:50,174 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-11 14:42:50,175 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-11 14:42:50,176 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-11 14:42:50,178 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2020-11-11 14:42:50,239 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-11 14:42:50,239 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-11 14:42:50,242 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-11 14:42:50,242 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-11 14:42:50,243 INFO L138 SettingsManager]: * Use SBE=true [2020-11-11 14:42:50,243 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-11 14:42:50,243 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-11 14:42:50,244 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-11 14:42:50,246 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-11 14:42:50,246 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-11 14:42:50,246 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-11 14:42:50,246 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-11 14:42:50,247 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-11 14:42:50,248 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-11 14:42:50,248 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-11 14:42:50,248 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-11 14:42:50,249 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-11 14:42:50,249 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-11 14:42:50,249 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-11 14:42:50,249 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-11 14:42:50,250 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-11 14:42:50,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-11 14:42:50,250 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-11 14:42:50,251 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-11 14:42:50,251 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-11 14:42:50,251 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-11 14:42:50,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-11 14:42:50,252 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-11-11 14:42:50,252 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-11 14:42:50,252 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-11 14:42:50,720 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-11 14:42:50,770 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-11 14:42:50,773 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-11 14:42:50,775 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-11 14:42:50,775 INFO L275 PluginConnector]: CDTParser initialized [2020-11-11 14:42:50,777 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2020-11-11 14:42:50,871 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1430f1fe/a8ebde1cc52c45cfbb822e09cb978f76/FLAGe0df44f29 [2020-11-11 14:42:51,556 INFO L306 CDTParser]: Found 1 translation units. [2020-11-11 14:42:51,557 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2020-11-11 14:42:51,578 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1430f1fe/a8ebde1cc52c45cfbb822e09cb978f76/FLAGe0df44f29 [2020-11-11 14:42:51,824 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1430f1fe/a8ebde1cc52c45cfbb822e09cb978f76 [2020-11-11 14:42:51,827 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-11 14:42:51,837 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-11 14:42:51,840 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-11 14:42:51,841 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-11 14:42:51,844 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-11 14:42:51,845 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 02:42:51" (1/1) ... [2020-11-11 14:42:51,854 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c1847b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 02:42:51, skipping insertion in model container [2020-11-11 14:42:51,854 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 02:42:51" (1/1) ... [2020-11-11 14:42:51,863 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-11 14:42:51,945 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-11 14:42:52,341 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-11 14:42:52,356 INFO L203 MainTranslator]: Completed pre-run [2020-11-11 14:42:52,433 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-11 14:42:52,546 INFO L208 MainTranslator]: Completed translation [2020-11-11 14:42:52,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 02:42:52 WrapperNode [2020-11-11 14:42:52,549 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-11 14:42:52,551 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-11 14:42:52,552 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-11 14:42:52,552 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-11 14:42:52,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 02:42:52" (1/1) ... [2020-11-11 14:42:52,576 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 02:42:52" (1/1) ... [2020-11-11 14:42:52,598 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-11 14:42:52,599 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-11 14:42:52,599 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-11 14:42:52,599 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-11 14:42:52,608 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 02:42:52" (1/1) ... [2020-11-11 14:42:52,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 02:42:52" (1/1) ... [2020-11-11 14:42:52,612 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 02:42:52" (1/1) ... [2020-11-11 14:42:52,612 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 02:42:52" (1/1) ... [2020-11-11 14:42:52,619 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 02:42:52" (1/1) ... [2020-11-11 14:42:52,623 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 02:42:52" (1/1) ... [2020-11-11 14:42:52,625 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 02:42:52" (1/1) ... [2020-11-11 14:42:52,628 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-11 14:42:52,629 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-11 14:42:52,630 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-11 14:42:52,630 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-11 14:42:52,631 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 02:42:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-11 14:42:52,722 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-11-11 14:42:52,722 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-11-11 14:42:52,722 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-11-11 14:42:52,722 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-11-11 14:42:52,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-11 14:42:52,722 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-11 14:42:52,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-11 14:42:52,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-11 14:42:52,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-11 14:42:52,723 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-11 14:42:52,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-11 14:42:52,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-11 14:42:52,725 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-11 14:42:53,084 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-11 14:42:53,085 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-11 14:42:53,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 02:42:53 BoogieIcfgContainer [2020-11-11 14:42:53,087 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-11 14:42:53,089 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-11 14:42:53,090 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-11 14:42:53,095 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-11 14:42:53,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.11 02:42:51" (1/3) ... [2020-11-11 14:42:53,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ca06056 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 02:42:53, skipping insertion in model container [2020-11-11 14:42:53,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 02:42:52" (2/3) ... [2020-11-11 14:42:53,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ca06056 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 02:42:53, skipping insertion in model container [2020-11-11 14:42:53,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 02:42:53" (3/3) ... [2020-11-11 14:42:53,099 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-1.i [2020-11-11 14:42:53,120 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-11 14:42:53,120 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-11 14:42:53,124 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-11 14:42:53,125 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-11 14:42:53,162 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,162 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,162 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,163 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,163 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,163 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,164 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,164 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,164 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,165 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,165 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,165 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,166 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,166 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,166 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,167 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,167 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,167 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,168 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,168 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,168 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,169 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,169 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,169 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,170 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,170 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,170 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,170 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,171 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,171 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,171 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,172 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,172 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,172 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,172 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,173 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,173 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,173 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,174 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,174 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,174 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,175 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,175 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,175 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,176 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,176 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,176 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,176 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,182 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,182 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,183 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,184 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,184 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,184 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,184 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,185 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,185 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,188 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,189 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,189 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,194 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,195 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,195 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,195 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,196 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,196 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,221 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,222 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,222 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,222 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,222 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,223 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,232 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-11 14:42:53,249 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-11 14:42:53,292 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-11 14:42:53,292 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-11 14:42:53,292 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-11 14:42:53,292 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-11 14:42:53,293 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-11 14:42:53,293 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-11 14:42:53,293 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-11 14:42:53,294 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-11 14:42:53,317 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 67 places, 66 transitions, 142 flow [2020-11-11 14:42:53,511 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2229 states, 2227 states have (on average 3.205208801077683) internal successors, (7138), 2228 states have internal predecessors, (7138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:42:53,524 INFO L276 IsEmpty]: Start isEmpty. Operand has 2229 states, 2227 states have (on average 3.205208801077683) internal successors, (7138), 2228 states have internal predecessors, (7138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:42:53,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-11 14:42:53,546 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:42:53,548 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:42:53,548 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:42:53,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:42:53,557 INFO L82 PathProgramCache]: Analyzing trace with hash 792846013, now seen corresponding path program 1 times [2020-11-11 14:42:53,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:42:53,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32345787] [2020-11-11 14:42:53,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:42:53,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:42:54,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:42:54,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32345787] [2020-11-11 14:42:54,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 14:42:54,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-11 14:42:54,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697443616] [2020-11-11 14:42:54,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-11 14:42:54,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:42:54,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-11 14:42:54,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-11 14:42:54,071 INFO L87 Difference]: Start difference. First operand has 2229 states, 2227 states have (on average 3.205208801077683) internal successors, (7138), 2228 states have internal predecessors, (7138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:42:54,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:42:54,336 INFO L93 Difference]: Finished difference Result 4034 states and 11738 transitions. [2020-11-11 14:42:54,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-11 14:42:54,338 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2020-11-11 14:42:54,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:42:54,368 INFO L225 Difference]: With dead ends: 4034 [2020-11-11 14:42:54,368 INFO L226 Difference]: Without dead ends: 1472 [2020-11-11 14:42:54,370 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-11-11 14:42:54,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2020-11-11 14:42:54,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 1127. [2020-11-11 14:42:54,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 1126 states have (on average 2.766429840142096) internal successors, (3115), 1126 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:42:54,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 3115 transitions. [2020-11-11 14:42:54,520 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 3115 transitions. Word has length 28 [2020-11-11 14:42:54,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:42:54,521 INFO L481 AbstractCegarLoop]: Abstraction has 1127 states and 3115 transitions. [2020-11-11 14:42:54,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:42:54,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 3115 transitions. [2020-11-11 14:42:54,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-11 14:42:54,527 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:42:54,527 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:42:54,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-11 14:42:54,528 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:42:54,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:42:54,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1269163793, now seen corresponding path program 1 times [2020-11-11 14:42:54,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:42:54,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817738245] [2020-11-11 14:42:54,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:42:54,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:42:54,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:42:54,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817738245] [2020-11-11 14:42:54,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 14:42:54,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-11 14:42:54,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979702336] [2020-11-11 14:42:54,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-11 14:42:54,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:42:54,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-11 14:42:54,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-11 14:42:54,798 INFO L87 Difference]: Start difference. First operand 1127 states and 3115 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:42:54,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:42:54,926 INFO L93 Difference]: Finished difference Result 1984 states and 5365 transitions. [2020-11-11 14:42:54,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-11 14:42:54,927 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2020-11-11 14:42:54,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:42:54,940 INFO L225 Difference]: With dead ends: 1984 [2020-11-11 14:42:54,940 INFO L226 Difference]: Without dead ends: 1726 [2020-11-11 14:42:54,941 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-11-11 14:42:54,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1726 states. [2020-11-11 14:42:54,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1726 to 1222. [2020-11-11 14:42:54,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 1221 states have (on average 2.7706797706797706) internal successors, (3383), 1221 states have internal predecessors, (3383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:42:55,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 3383 transitions. [2020-11-11 14:42:55,004 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 3383 transitions. Word has length 33 [2020-11-11 14:42:55,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:42:55,005 INFO L481 AbstractCegarLoop]: Abstraction has 1222 states and 3383 transitions. [2020-11-11 14:42:55,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:42:55,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 3383 transitions. [2020-11-11 14:42:55,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-11 14:42:55,009 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:42:55,009 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:42:55,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-11 14:42:55,009 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:42:55,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:42:55,010 INFO L82 PathProgramCache]: Analyzing trace with hash -11030355, now seen corresponding path program 1 times [2020-11-11 14:42:55,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:42:55,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176138153] [2020-11-11 14:42:55,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:42:55,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:42:55,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:42:55,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176138153] [2020-11-11 14:42:55,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 14:42:55,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-11 14:42:55,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579922399] [2020-11-11 14:42:55,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-11 14:42:55,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:42:55,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-11 14:42:55,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-11 14:42:55,210 INFO L87 Difference]: Start difference. First operand 1222 states and 3383 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:42:55,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:42:55,349 INFO L93 Difference]: Finished difference Result 2030 states and 5424 transitions. [2020-11-11 14:42:55,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-11 14:42:55,350 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2020-11-11 14:42:55,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:42:55,362 INFO L225 Difference]: With dead ends: 2030 [2020-11-11 14:42:55,362 INFO L226 Difference]: Without dead ends: 1726 [2020-11-11 14:42:55,363 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-11-11 14:42:55,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1726 states. [2020-11-11 14:42:55,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1726 to 1325. [2020-11-11 14:42:55,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1325 states, 1324 states have (on average 2.7235649546827796) internal successors, (3606), 1324 states have internal predecessors, (3606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:42:55,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 3606 transitions. [2020-11-11 14:42:55,419 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 3606 transitions. Word has length 33 [2020-11-11 14:42:55,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:42:55,420 INFO L481 AbstractCegarLoop]: Abstraction has 1325 states and 3606 transitions. [2020-11-11 14:42:55,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:42:55,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 3606 transitions. [2020-11-11 14:42:55,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-11 14:42:55,423 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:42:55,423 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:42:55,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-11 14:42:55,424 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:42:55,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:42:55,424 INFO L82 PathProgramCache]: Analyzing trace with hash 810583645, now seen corresponding path program 2 times [2020-11-11 14:42:55,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:42:55,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191366572] [2020-11-11 14:42:55,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:42:55,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:42:55,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:42:55,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191366572] [2020-11-11 14:42:55,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 14:42:55,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-11 14:42:55,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426312779] [2020-11-11 14:42:55,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-11 14:42:55,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:42:55,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-11 14:42:55,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-11-11 14:42:55,534 INFO L87 Difference]: Start difference. First operand 1325 states and 3606 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:42:55,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:42:55,670 INFO L93 Difference]: Finished difference Result 2222 states and 5936 transitions. [2020-11-11 14:42:55,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-11 14:42:55,671 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2020-11-11 14:42:55,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:42:55,685 INFO L225 Difference]: With dead ends: 2222 [2020-11-11 14:42:55,685 INFO L226 Difference]: Without dead ends: 1900 [2020-11-11 14:42:55,686 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-11-11 14:42:55,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2020-11-11 14:42:55,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1403. [2020-11-11 14:42:55,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1403 states, 1402 states have (on average 2.732524964336662) internal successors, (3831), 1402 states have internal predecessors, (3831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:42:55,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1403 states to 1403 states and 3831 transitions. [2020-11-11 14:42:55,746 INFO L78 Accepts]: Start accepts. Automaton has 1403 states and 3831 transitions. Word has length 33 [2020-11-11 14:42:55,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:42:55,747 INFO L481 AbstractCegarLoop]: Abstraction has 1403 states and 3831 transitions. [2020-11-11 14:42:55,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:42:55,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1403 states and 3831 transitions. [2020-11-11 14:42:55,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-11 14:42:55,750 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:42:55,750 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:42:55,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-11 14:42:55,751 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:42:55,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:42:55,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1172880459, now seen corresponding path program 1 times [2020-11-11 14:42:55,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:42:55,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490265439] [2020-11-11 14:42:55,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:42:55,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:42:55,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:42:55,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490265439] [2020-11-11 14:42:55,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 14:42:55,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-11 14:42:55,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387173458] [2020-11-11 14:42:55,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-11 14:42:55,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:42:55,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-11 14:42:55,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-11-11 14:42:55,906 INFO L87 Difference]: Start difference. First operand 1403 states and 3831 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:42:56,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:42:56,019 INFO L93 Difference]: Finished difference Result 2116 states and 5627 transitions. [2020-11-11 14:42:56,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-11 14:42:56,020 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2020-11-11 14:42:56,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:42:56,036 INFO L225 Difference]: With dead ends: 2116 [2020-11-11 14:42:56,036 INFO L226 Difference]: Without dead ends: 1964 [2020-11-11 14:42:56,038 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-11-11 14:42:56,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1964 states. [2020-11-11 14:42:56,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1964 to 1428. [2020-11-11 14:42:56,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1427 states have (on average 2.7231955150665734) internal successors, (3886), 1427 states have internal predecessors, (3886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:42:56,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 3886 transitions. [2020-11-11 14:42:56,105 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 3886 transitions. Word has length 38 [2020-11-11 14:42:56,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:42:56,105 INFO L481 AbstractCegarLoop]: Abstraction has 1428 states and 3886 transitions. [2020-11-11 14:42:56,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:42:56,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 3886 transitions. [2020-11-11 14:42:56,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-11 14:42:56,110 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:42:56,110 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:42:56,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-11 14:42:56,111 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:42:56,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:42:56,111 INFO L82 PathProgramCache]: Analyzing trace with hash 986200915, now seen corresponding path program 2 times [2020-11-11 14:42:56,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:42:56,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881365929] [2020-11-11 14:42:56,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:42:56,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:42:56,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:42:56,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881365929] [2020-11-11 14:42:56,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 14:42:56,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-11 14:42:56,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055238135] [2020-11-11 14:42:56,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-11 14:42:56,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:42:56,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-11 14:42:56,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-11 14:42:56,329 INFO L87 Difference]: Start difference. First operand 1428 states and 3886 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:42:56,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:42:56,578 INFO L93 Difference]: Finished difference Result 2692 states and 7163 transitions. [2020-11-11 14:42:56,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 14:42:56,579 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2020-11-11 14:42:56,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:42:56,596 INFO L225 Difference]: With dead ends: 2692 [2020-11-11 14:42:56,596 INFO L226 Difference]: Without dead ends: 2264 [2020-11-11 14:42:56,597 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-11-11 14:42:56,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2020-11-11 14:42:56,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 1571. [2020-11-11 14:42:56,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1570 states have (on average 2.7229299363057327) internal successors, (4275), 1570 states have internal predecessors, (4275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:42:56,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 4275 transitions. [2020-11-11 14:42:56,673 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 4275 transitions. Word has length 38 [2020-11-11 14:42:56,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:42:56,673 INFO L481 AbstractCegarLoop]: Abstraction has 1571 states and 4275 transitions. [2020-11-11 14:42:56,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:42:56,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 4275 transitions. [2020-11-11 14:42:56,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-11 14:42:56,677 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:42:56,677 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:42:56,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-11 14:42:56,677 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:42:56,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:42:56,678 INFO L82 PathProgramCache]: Analyzing trace with hash 155330065, now seen corresponding path program 3 times [2020-11-11 14:42:56,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:42:56,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449036061] [2020-11-11 14:42:56,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:42:56,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:42:56,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:42:56,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449036061] [2020-11-11 14:42:56,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 14:42:56,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-11 14:42:56,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938776294] [2020-11-11 14:42:56,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-11 14:42:56,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:42:56,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-11 14:42:56,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-11 14:42:56,819 INFO L87 Difference]: Start difference. First operand 1571 states and 4275 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:42:57,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:42:57,014 INFO L93 Difference]: Finished difference Result 2840 states and 7553 transitions. [2020-11-11 14:42:57,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-11 14:42:57,014 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2020-11-11 14:42:57,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:42:57,031 INFO L225 Difference]: With dead ends: 2840 [2020-11-11 14:42:57,031 INFO L226 Difference]: Without dead ends: 2534 [2020-11-11 14:42:57,032 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-11-11 14:42:57,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2020-11-11 14:42:57,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 1703. [2020-11-11 14:42:57,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1703 states, 1702 states have (on average 2.710340775558167) internal successors, (4613), 1702 states have internal predecessors, (4613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:42:57,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 4613 transitions. [2020-11-11 14:42:57,101 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 4613 transitions. Word has length 38 [2020-11-11 14:42:57,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:42:57,102 INFO L481 AbstractCegarLoop]: Abstraction has 1703 states and 4613 transitions. [2020-11-11 14:42:57,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:42:57,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 4613 transitions. [2020-11-11 14:42:57,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-11 14:42:57,105 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:42:57,105 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:42:57,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-11 14:42:57,106 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:42:57,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:42:57,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1891700926, now seen corresponding path program 1 times [2020-11-11 14:42:57,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:42:57,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141201682] [2020-11-11 14:42:57,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:42:57,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:42:57,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:42:57,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141201682] [2020-11-11 14:42:57,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220096887] [2020-11-11 14:42:57,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:42:57,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:42:57,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 14:42:57,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:42:57,557 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:42:57,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:42:57,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:42:57,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-11-11 14:42:57,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388970034] [2020-11-11 14:42:57,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 14:42:57,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:42:57,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 14:42:57,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-11-11 14:42:57,578 INFO L87 Difference]: Start difference. First operand 1703 states and 4613 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:42:57,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:42:57,810 INFO L93 Difference]: Finished difference Result 2760 states and 7217 transitions. [2020-11-11 14:42:57,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-11 14:42:57,811 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2020-11-11 14:42:57,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:42:57,827 INFO L225 Difference]: With dead ends: 2760 [2020-11-11 14:42:57,827 INFO L226 Difference]: Without dead ends: 2456 [2020-11-11 14:42:57,828 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2020-11-11 14:42:57,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2456 states. [2020-11-11 14:42:57,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2456 to 1752. [2020-11-11 14:42:57,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.690462592804112) internal successors, (4711), 1751 states have internal predecessors, (4711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:42:57,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 4711 transitions. [2020-11-11 14:42:57,915 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 4711 transitions. Word has length 43 [2020-11-11 14:42:57,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:42:57,916 INFO L481 AbstractCegarLoop]: Abstraction has 1752 states and 4711 transitions. [2020-11-11 14:42:57,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:42:57,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 4711 transitions. [2020-11-11 14:42:57,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-11 14:42:57,919 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:42:57,920 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:42:58,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-11-11 14:42:58,134 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:42:58,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:42:58,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1515548458, now seen corresponding path program 2 times [2020-11-11 14:42:58,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:42:58,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297305760] [2020-11-11 14:42:58,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:42:58,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:42:58,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:42:58,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297305760] [2020-11-11 14:42:58,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033711608] [2020-11-11 14:42:58,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:42:58,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 14:42:58,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:42:58,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 14:42:58,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:42:58,444 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:42:58,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:42:58,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:42:58,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-11-11 14:42:58,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048170235] [2020-11-11 14:42:58,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 14:42:58,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:42:58,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 14:42:58,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-11-11 14:42:58,455 INFO L87 Difference]: Start difference. First operand 1752 states and 4711 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:42:58,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:42:58,667 INFO L93 Difference]: Finished difference Result 2688 states and 7009 transitions. [2020-11-11 14:42:58,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-11 14:42:58,668 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2020-11-11 14:42:58,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:42:58,684 INFO L225 Difference]: With dead ends: 2688 [2020-11-11 14:42:58,684 INFO L226 Difference]: Without dead ends: 2536 [2020-11-11 14:42:58,685 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2020-11-11 14:42:58,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2536 states. [2020-11-11 14:42:58,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2536 to 1782. [2020-11-11 14:42:58,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1782 states, 1781 states have (on average 2.678832116788321) internal successors, (4771), 1781 states have internal predecessors, (4771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:42:58,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 4771 transitions. [2020-11-11 14:42:58,748 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 4771 transitions. Word has length 43 [2020-11-11 14:42:58,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:42:58,748 INFO L481 AbstractCegarLoop]: Abstraction has 1782 states and 4771 transitions. [2020-11-11 14:42:58,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:42:58,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 4771 transitions. [2020-11-11 14:42:58,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-11 14:42:58,752 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:42:58,753 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:42:58,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:42:58,969 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:42:58,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:42:58,970 INFO L82 PathProgramCache]: Analyzing trace with hash -113571500, now seen corresponding path program 3 times [2020-11-11 14:42:58,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:42:58,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892250893] [2020-11-11 14:42:58,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:42:58,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:42:59,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:42:59,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892250893] [2020-11-11 14:42:59,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791862394] [2020-11-11 14:42:59,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:42:59,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-11 14:42:59,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:42:59,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 14:42:59,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:42:59,235 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:42:59,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:42:59,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:42:59,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-11-11 14:42:59,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742014011] [2020-11-11 14:42:59,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 14:42:59,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:42:59,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 14:42:59,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2020-11-11 14:42:59,247 INFO L87 Difference]: Start difference. First operand 1782 states and 4771 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:42:59,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:42:59,460 INFO L93 Difference]: Finished difference Result 2944 states and 7585 transitions. [2020-11-11 14:42:59,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-11 14:42:59,461 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2020-11-11 14:42:59,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:42:59,470 INFO L225 Difference]: With dead ends: 2944 [2020-11-11 14:42:59,470 INFO L226 Difference]: Without dead ends: 2640 [2020-11-11 14:42:59,471 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:42:59,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2640 states. [2020-11-11 14:42:59,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2640 to 1802. [2020-11-11 14:42:59,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1802 states, 1801 states have (on average 2.684619655746807) internal successors, (4835), 1801 states have internal predecessors, (4835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:42:59,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1802 states to 1802 states and 4835 transitions. [2020-11-11 14:42:59,536 INFO L78 Accepts]: Start accepts. Automaton has 1802 states and 4835 transitions. Word has length 43 [2020-11-11 14:42:59,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:42:59,537 INFO L481 AbstractCegarLoop]: Abstraction has 1802 states and 4835 transitions. [2020-11-11 14:42:59,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:42:59,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1802 states and 4835 transitions. [2020-11-11 14:42:59,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-11 14:42:59,540 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:42:59,541 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:42:59,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-11 14:42:59,755 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:42:59,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:42:59,756 INFO L82 PathProgramCache]: Analyzing trace with hash -784309816, now seen corresponding path program 4 times [2020-11-11 14:42:59,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:42:59,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235048930] [2020-11-11 14:42:59,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:42:59,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:42:59,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:42:59,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235048930] [2020-11-11 14:42:59,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514979753] [2020-11-11 14:42:59,916 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:42:59,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 14:42:59,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:42:59,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 14:42:59,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:00,076 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:00,108 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:00,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:00,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:00,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-11-11 14:43:00,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068336893] [2020-11-11 14:43:00,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 14:43:00,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:00,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 14:43:00,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-11-11 14:43:00,167 INFO L87 Difference]: Start difference. First operand 1802 states and 4835 transitions. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:00,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:00,676 INFO L93 Difference]: Finished difference Result 4038 states and 10508 transitions. [2020-11-11 14:43:00,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 14:43:00,676 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2020-11-11 14:43:00,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:00,688 INFO L225 Difference]: With dead ends: 4038 [2020-11-11 14:43:00,689 INFO L226 Difference]: Without dead ends: 3328 [2020-11-11 14:43:00,690 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=761, Unknown=0, NotChecked=0, Total=992 [2020-11-11 14:43:00,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3328 states. [2020-11-11 14:43:00,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3328 to 1896. [2020-11-11 14:43:00,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1895 states have (on average 2.7150395778364116) internal successors, (5145), 1895 states have internal predecessors, (5145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:00,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 5145 transitions. [2020-11-11 14:43:00,783 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 5145 transitions. Word has length 43 [2020-11-11 14:43:00,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:00,783 INFO L481 AbstractCegarLoop]: Abstraction has 1896 states and 5145 transitions. [2020-11-11 14:43:00,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:00,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 5145 transitions. [2020-11-11 14:43:00,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-11 14:43:00,793 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:00,793 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:43:00,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:00,994 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:00,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:00,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1881175634, now seen corresponding path program 5 times [2020-11-11 14:43:00,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:00,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696907186] [2020-11-11 14:43:00,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:01,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:01,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:01,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696907186] [2020-11-11 14:43:01,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524064162] [2020-11-11 14:43:01,112 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:01,169 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 14:43:01,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:01,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 14:43:01,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:01,270 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:01,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:01,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:01,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-11-11 14:43:01,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816240328] [2020-11-11 14:43:01,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 14:43:01,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:01,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 14:43:01,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-11-11 14:43:01,279 INFO L87 Difference]: Start difference. First operand 1896 states and 5145 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:01,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:01,644 INFO L93 Difference]: Finished difference Result 3374 states and 8808 transitions. [2020-11-11 14:43:01,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-11 14:43:01,645 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2020-11-11 14:43:01,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:01,656 INFO L225 Difference]: With dead ends: 3374 [2020-11-11 14:43:01,656 INFO L226 Difference]: Without dead ends: 3222 [2020-11-11 14:43:01,657 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-11-11 14:43:01,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3222 states. [2020-11-11 14:43:01,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3222 to 2008. [2020-11-11 14:43:01,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 2007 states have (on average 2.74090682610862) internal successors, (5501), 2007 states have internal predecessors, (5501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:01,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 5501 transitions. [2020-11-11 14:43:01,733 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 5501 transitions. Word has length 43 [2020-11-11 14:43:01,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:01,733 INFO L481 AbstractCegarLoop]: Abstraction has 2008 states and 5501 transitions. [2020-11-11 14:43:01,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:01,733 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 5501 transitions. [2020-11-11 14:43:01,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-11 14:43:01,737 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:01,737 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:43:01,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-11 14:43:01,952 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:01,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:01,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1455611250, now seen corresponding path program 6 times [2020-11-11 14:43:01,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:01,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325218803] [2020-11-11 14:43:01,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:01,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:02,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:02,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325218803] [2020-11-11 14:43:02,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880641655] [2020-11-11 14:43:02,072 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:02,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-11-11 14:43:02,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:02,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 14:43:02,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:02,208 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 14:43:02,220 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:02,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:02,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:02,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-11-11 14:43:02,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685243458] [2020-11-11 14:43:02,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 14:43:02,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:02,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 14:43:02,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-11-11 14:43:02,230 INFO L87 Difference]: Start difference. First operand 2008 states and 5501 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:02,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:02,843 INFO L93 Difference]: Finished difference Result 4284 states and 11395 transitions. [2020-11-11 14:43:02,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 14:43:02,844 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2020-11-11 14:43:02,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:02,855 INFO L225 Difference]: With dead ends: 4284 [2020-11-11 14:43:02,855 INFO L226 Difference]: Without dead ends: 3702 [2020-11-11 14:43:02,856 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=287, Invalid=973, Unknown=0, NotChecked=0, Total=1260 [2020-11-11 14:43:02,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3702 states. [2020-11-11 14:43:02,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3702 to 2214. [2020-11-11 14:43:02,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2214 states, 2213 states have (on average 2.7311342069588793) internal successors, (6044), 2213 states have internal predecessors, (6044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:02,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2214 states to 2214 states and 6044 transitions. [2020-11-11 14:43:02,935 INFO L78 Accepts]: Start accepts. Automaton has 2214 states and 6044 transitions. Word has length 43 [2020-11-11 14:43:02,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:02,936 INFO L481 AbstractCegarLoop]: Abstraction has 2214 states and 6044 transitions. [2020-11-11 14:43:02,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:02,936 INFO L276 IsEmpty]: Start isEmpty. Operand 2214 states and 6044 transitions. [2020-11-11 14:43:02,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-11 14:43:02,941 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:02,942 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:43:03,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:03,155 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:03,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:03,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1176461249, now seen corresponding path program 7 times [2020-11-11 14:43:03,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:03,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752702395] [2020-11-11 14:43:03,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:03,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:03,373 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:03,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752702395] [2020-11-11 14:43:03,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978749204] [2020-11-11 14:43:03,374 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:03,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:03,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 14:43:03,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:03,589 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:03,608 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:03,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:03,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-11-11 14:43:03,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367916406] [2020-11-11 14:43:03,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 14:43:03,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:03,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 14:43:03,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-11-11 14:43:03,611 INFO L87 Difference]: Start difference. First operand 2214 states and 6044 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:03,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:03,990 INFO L93 Difference]: Finished difference Result 3610 states and 9380 transitions. [2020-11-11 14:43:03,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-11 14:43:03,991 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2020-11-11 14:43:03,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:04,000 INFO L225 Difference]: With dead ends: 3610 [2020-11-11 14:43:04,001 INFO L226 Difference]: Without dead ends: 3306 [2020-11-11 14:43:04,001 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2020-11-11 14:43:04,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3306 states. [2020-11-11 14:43:04,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3306 to 2313. [2020-11-11 14:43:04,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2313 states, 2312 states have (on average 2.704152249134948) internal successors, (6252), 2312 states have internal predecessors, (6252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:04,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 6252 transitions. [2020-11-11 14:43:04,087 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 6252 transitions. Word has length 48 [2020-11-11 14:43:04,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:04,087 INFO L481 AbstractCegarLoop]: Abstraction has 2313 states and 6252 transitions. [2020-11-11 14:43:04,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:04,087 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 6252 transitions. [2020-11-11 14:43:04,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-11 14:43:04,092 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:04,092 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:43:04,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-11 14:43:04,307 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:04,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:04,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1275776819, now seen corresponding path program 1 times [2020-11-11 14:43:04,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:04,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375370673] [2020-11-11 14:43:04,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:04,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:04,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:04,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375370673] [2020-11-11 14:43:04,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508484892] [2020-11-11 14:43:04,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:04,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:04,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 14:43:04,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:04,623 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:04,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:04,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:04,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-11-11 14:43:04,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159192733] [2020-11-11 14:43:04,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 14:43:04,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:04,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 14:43:04,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-11-11 14:43:04,634 INFO L87 Difference]: Start difference. First operand 2313 states and 6252 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:04,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:04,952 INFO L93 Difference]: Finished difference Result 3538 states and 9172 transitions. [2020-11-11 14:43:04,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 14:43:04,952 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2020-11-11 14:43:04,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:04,962 INFO L225 Difference]: With dead ends: 3538 [2020-11-11 14:43:04,963 INFO L226 Difference]: Without dead ends: 3386 [2020-11-11 14:43:04,969 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2020-11-11 14:43:04,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3386 states. [2020-11-11 14:43:05,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 2372. [2020-11-11 14:43:05,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2372 states, 2371 states have (on average 2.689582454660481) internal successors, (6377), 2371 states have internal predecessors, (6377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:05,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2372 states to 2372 states and 6377 transitions. [2020-11-11 14:43:05,044 INFO L78 Accepts]: Start accepts. Automaton has 2372 states and 6377 transitions. Word has length 48 [2020-11-11 14:43:05,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:05,044 INFO L481 AbstractCegarLoop]: Abstraction has 2372 states and 6377 transitions. [2020-11-11 14:43:05,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:05,044 INFO L276 IsEmpty]: Start isEmpty. Operand 2372 states and 6377 transitions. [2020-11-11 14:43:05,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-11 14:43:05,050 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:05,050 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:43:05,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-11 14:43:05,264 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:05,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:05,265 INFO L82 PathProgramCache]: Analyzing trace with hash 877660941, now seen corresponding path program 2 times [2020-11-11 14:43:05,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:05,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530543720] [2020-11-11 14:43:05,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:05,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:05,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:05,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530543720] [2020-11-11 14:43:05,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087591647] [2020-11-11 14:43:05,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:05,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 14:43:05,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:05,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 14:43:05,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:05,643 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:05,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:05,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:05,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-11-11 14:43:05,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720351244] [2020-11-11 14:43:05,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 14:43:05,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:05,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 14:43:05,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-11-11 14:43:05,653 INFO L87 Difference]: Start difference. First operand 2372 states and 6377 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:05,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:05,863 INFO L93 Difference]: Finished difference Result 3354 states and 8804 transitions. [2020-11-11 14:43:05,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-11 14:43:05,864 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2020-11-11 14:43:05,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:05,874 INFO L225 Difference]: With dead ends: 3354 [2020-11-11 14:43:05,874 INFO L226 Difference]: Without dead ends: 3202 [2020-11-11 14:43:05,875 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:43:05,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3202 states. [2020-11-11 14:43:05,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3202 to 2347. [2020-11-11 14:43:05,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 2346 states have (on average 2.6947996589940324) internal successors, (6322), 2346 states have internal predecessors, (6322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:05,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 6322 transitions. [2020-11-11 14:43:05,944 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 6322 transitions. Word has length 48 [2020-11-11 14:43:05,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:05,945 INFO L481 AbstractCegarLoop]: Abstraction has 2347 states and 6322 transitions. [2020-11-11 14:43:05,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:05,945 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 6322 transitions. [2020-11-11 14:43:05,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-11 14:43:05,950 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:05,950 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:43:06,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-11 14:43:06,164 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:06,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:06,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1441005203, now seen corresponding path program 8 times [2020-11-11 14:43:06,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:06,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654124307] [2020-11-11 14:43:06,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:06,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:06,297 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:06,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654124307] [2020-11-11 14:43:06,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812315068] [2020-11-11 14:43:06,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:06,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 14:43:06,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:06,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 14:43:06,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:06,502 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:06,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:06,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:06,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-11-11 14:43:06,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207743801] [2020-11-11 14:43:06,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 14:43:06,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:06,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 14:43:06,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-11-11 14:43:06,514 INFO L87 Difference]: Start difference. First operand 2347 states and 6322 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:06,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:06,856 INFO L93 Difference]: Finished difference Result 3960 states and 10085 transitions. [2020-11-11 14:43:06,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-11 14:43:06,857 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2020-11-11 14:43:06,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:06,868 INFO L225 Difference]: With dead ends: 3960 [2020-11-11 14:43:06,868 INFO L226 Difference]: Without dead ends: 3656 [2020-11-11 14:43:06,869 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2020-11-11 14:43:06,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3656 states. [2020-11-11 14:43:06,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3656 to 2322. [2020-11-11 14:43:06,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2322 states, 2321 states have (on average 2.7001292546316242) internal successors, (6267), 2321 states have internal predecessors, (6267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:06,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2322 states to 2322 states and 6267 transitions. [2020-11-11 14:43:06,943 INFO L78 Accepts]: Start accepts. Automaton has 2322 states and 6267 transitions. Word has length 48 [2020-11-11 14:43:06,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:06,943 INFO L481 AbstractCegarLoop]: Abstraction has 2322 states and 6267 transitions. [2020-11-11 14:43:06,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:06,943 INFO L276 IsEmpty]: Start isEmpty. Operand 2322 states and 6267 transitions. [2020-11-11 14:43:06,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-11 14:43:06,948 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:06,948 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:43:07,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-11 14:43:07,171 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:07,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:07,172 INFO L82 PathProgramCache]: Analyzing trace with hash -466213799, now seen corresponding path program 9 times [2020-11-11 14:43:07,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:07,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22221537] [2020-11-11 14:43:07,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:07,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:07,319 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:07,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22221537] [2020-11-11 14:43:07,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087637452] [2020-11-11 14:43:07,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:07,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-11 14:43:07,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:07,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 14:43:07,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:07,504 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:07,513 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:07,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:07,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-11-11 14:43:07,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066028292] [2020-11-11 14:43:07,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 14:43:07,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:07,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 14:43:07,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-11-11 14:43:07,515 INFO L87 Difference]: Start difference. First operand 2322 states and 6267 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:07,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:07,985 INFO L93 Difference]: Finished difference Result 4298 states and 11081 transitions. [2020-11-11 14:43:07,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 14:43:07,985 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2020-11-11 14:43:07,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:08,005 INFO L225 Difference]: With dead ends: 4298 [2020-11-11 14:43:08,006 INFO L226 Difference]: Without dead ends: 3994 [2020-11-11 14:43:08,006 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=752, Unknown=0, NotChecked=0, Total=992 [2020-11-11 14:43:08,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3994 states. [2020-11-11 14:43:08,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3994 to 2527. [2020-11-11 14:43:08,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2527 states, 2526 states have (on average 2.750989707046714) internal successors, (6949), 2526 states have internal predecessors, (6949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:08,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2527 states to 2527 states and 6949 transitions. [2020-11-11 14:43:08,086 INFO L78 Accepts]: Start accepts. Automaton has 2527 states and 6949 transitions. Word has length 48 [2020-11-11 14:43:08,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:08,086 INFO L481 AbstractCegarLoop]: Abstraction has 2527 states and 6949 transitions. [2020-11-11 14:43:08,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:08,086 INFO L276 IsEmpty]: Start isEmpty. Operand 2527 states and 6949 transitions. [2020-11-11 14:43:08,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-11 14:43:08,094 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:08,094 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:43:08,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-11 14:43:08,309 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:08,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:08,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1424394211, now seen corresponding path program 10 times [2020-11-11 14:43:08,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:08,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903439093] [2020-11-11 14:43:08,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:08,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:08,459 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:08,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903439093] [2020-11-11 14:43:08,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283676339] [2020-11-11 14:43:08,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:08,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 14:43:08,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:08,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 14:43:08,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:08,622 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 14:43:08,634 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:08,641 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:08,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:08,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-11-11 14:43:08,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742421512] [2020-11-11 14:43:08,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 14:43:08,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:08,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 14:43:08,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-11-11 14:43:08,645 INFO L87 Difference]: Start difference. First operand 2527 states and 6949 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:09,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:09,490 INFO L93 Difference]: Finished difference Result 5000 states and 13209 transitions. [2020-11-11 14:43:09,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 14:43:09,490 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2020-11-11 14:43:09,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:09,500 INFO L225 Difference]: With dead ends: 5000 [2020-11-11 14:43:09,501 INFO L226 Difference]: Without dead ends: 4360 [2020-11-11 14:43:09,502 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=427, Invalid=1379, Unknown=0, NotChecked=0, Total=1806 [2020-11-11 14:43:09,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4360 states. [2020-11-11 14:43:09,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4360 to 2545. [2020-11-11 14:43:09,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2545 states, 2544 states have (on average 2.729952830188679) internal successors, (6945), 2544 states have internal predecessors, (6945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:09,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2545 states to 2545 states and 6945 transitions. [2020-11-11 14:43:09,577 INFO L78 Accepts]: Start accepts. Automaton has 2545 states and 6945 transitions. Word has length 48 [2020-11-11 14:43:09,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:09,577 INFO L481 AbstractCegarLoop]: Abstraction has 2545 states and 6945 transitions. [2020-11-11 14:43:09,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:09,577 INFO L276 IsEmpty]: Start isEmpty. Operand 2545 states and 6945 transitions. [2020-11-11 14:43:09,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-11 14:43:09,582 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:09,583 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:43:09,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:09,797 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:09,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:09,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1153932635, now seen corresponding path program 3 times [2020-11-11 14:43:09,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:09,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890751075] [2020-11-11 14:43:09,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:09,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:09,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:09,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890751075] [2020-11-11 14:43:09,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345566302] [2020-11-11 14:43:09,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:09,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-11 14:43:09,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:09,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 14:43:09,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:10,103 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:10,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:10,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:10,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-11-11 14:43:10,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163059752] [2020-11-11 14:43:10,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 14:43:10,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:10,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 14:43:10,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-11-11 14:43:10,116 INFO L87 Difference]: Start difference. First operand 2545 states and 6945 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:10,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:10,612 INFO L93 Difference]: Finished difference Result 4354 states and 11226 transitions. [2020-11-11 14:43:10,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 14:43:10,612 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2020-11-11 14:43:10,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:10,622 INFO L225 Difference]: With dead ends: 4354 [2020-11-11 14:43:10,622 INFO L226 Difference]: Without dead ends: 4202 [2020-11-11 14:43:10,623 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2020-11-11 14:43:10,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4202 states. [2020-11-11 14:43:10,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4202 to 2727. [2020-11-11 14:43:10,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2727 states, 2726 states have (on average 2.7457813646368305) internal successors, (7485), 2726 states have internal predecessors, (7485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:10,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2727 states to 2727 states and 7485 transitions. [2020-11-11 14:43:10,704 INFO L78 Accepts]: Start accepts. Automaton has 2727 states and 7485 transitions. Word has length 48 [2020-11-11 14:43:10,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:10,704 INFO L481 AbstractCegarLoop]: Abstraction has 2727 states and 7485 transitions. [2020-11-11 14:43:10,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:10,704 INFO L276 IsEmpty]: Start isEmpty. Operand 2727 states and 7485 transitions. [2020-11-11 14:43:10,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-11 14:43:10,713 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:10,713 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:43:10,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2020-11-11 14:43:10,928 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:10,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:10,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1756245019, now seen corresponding path program 4 times [2020-11-11 14:43:10,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:10,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745367676] [2020-11-11 14:43:10,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:10,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:11,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:11,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745367676] [2020-11-11 14:43:11,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096877494] [2020-11-11 14:43:11,039 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:11,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 14:43:11,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:11,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 14:43:11,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:11,249 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:11,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:11,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:11,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-11-11 14:43:11,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998723501] [2020-11-11 14:43:11,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 14:43:11,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:11,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 14:43:11,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-11-11 14:43:11,261 INFO L87 Difference]: Start difference. First operand 2727 states and 7485 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:11,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:11,803 INFO L93 Difference]: Finished difference Result 4419 states and 11726 transitions. [2020-11-11 14:43:11,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 14:43:11,803 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2020-11-11 14:43:11,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:11,810 INFO L225 Difference]: With dead ends: 4419 [2020-11-11 14:43:11,810 INFO L226 Difference]: Without dead ends: 4267 [2020-11-11 14:43:11,811 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2020-11-11 14:43:11,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4267 states. [2020-11-11 14:43:11,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4267 to 2807. [2020-11-11 14:43:11,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2807 states, 2806 states have (on average 2.777975766215253) internal successors, (7795), 2806 states have internal predecessors, (7795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:11,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2807 states to 2807 states and 7795 transitions. [2020-11-11 14:43:11,896 INFO L78 Accepts]: Start accepts. Automaton has 2807 states and 7795 transitions. Word has length 48 [2020-11-11 14:43:11,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:11,897 INFO L481 AbstractCegarLoop]: Abstraction has 2807 states and 7795 transitions. [2020-11-11 14:43:11,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:11,897 INFO L276 IsEmpty]: Start isEmpty. Operand 2807 states and 7795 transitions. [2020-11-11 14:43:11,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-11 14:43:11,902 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:11,902 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:43:12,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:12,118 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:12,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:12,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1580541865, now seen corresponding path program 5 times [2020-11-11 14:43:12,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:12,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615083086] [2020-11-11 14:43:12,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:12,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:12,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:12,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615083086] [2020-11-11 14:43:12,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539430581] [2020-11-11 14:43:12,238 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:12,293 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 14:43:12,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:12,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 14:43:12,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:12,389 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 14:43:12,410 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:12,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:12,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:12,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-11-11 14:43:12,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672426157] [2020-11-11 14:43:12,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 14:43:12,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:12,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 14:43:12,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-11-11 14:43:12,424 INFO L87 Difference]: Start difference. First operand 2807 states and 7795 transitions. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:13,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:13,464 INFO L93 Difference]: Finished difference Result 5900 states and 15563 transitions. [2020-11-11 14:43:13,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-11 14:43:13,465 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2020-11-11 14:43:13,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:13,473 INFO L225 Difference]: With dead ends: 5900 [2020-11-11 14:43:13,473 INFO L226 Difference]: Without dead ends: 5312 [2020-11-11 14:43:13,474 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=561, Invalid=1989, Unknown=0, NotChecked=0, Total=2550 [2020-11-11 14:43:13,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5312 states. [2020-11-11 14:43:13,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5312 to 2845. [2020-11-11 14:43:13,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2845 states, 2844 states have (on average 2.7475386779184245) internal successors, (7814), 2844 states have internal predecessors, (7814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:13,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2845 states to 2845 states and 7814 transitions. [2020-11-11 14:43:13,570 INFO L78 Accepts]: Start accepts. Automaton has 2845 states and 7814 transitions. Word has length 48 [2020-11-11 14:43:13,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:13,571 INFO L481 AbstractCegarLoop]: Abstraction has 2845 states and 7814 transitions. [2020-11-11 14:43:13,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:13,571 INFO L276 IsEmpty]: Start isEmpty. Operand 2845 states and 7814 transitions. [2020-11-11 14:43:13,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:13,576 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:13,577 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:43:13,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-11 14:43:13,790 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:13,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:13,791 INFO L82 PathProgramCache]: Analyzing trace with hash 359511380, now seen corresponding path program 6 times [2020-11-11 14:43:13,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:13,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904254621] [2020-11-11 14:43:13,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:13,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:14,026 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:14,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904254621] [2020-11-11 14:43:14,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703955305] [2020-11-11 14:43:14,027 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:14,088 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 14:43:14,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:14,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 14:43:14,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:14,265 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:14,268 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:14,272 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:14,319 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:14,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:14,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-11-11 14:43:14,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068872211] [2020-11-11 14:43:14,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 14:43:14,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:14,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 14:43:14,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-11-11 14:43:14,322 INFO L87 Difference]: Start difference. First operand 2845 states and 7814 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:14,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:14,667 INFO L93 Difference]: Finished difference Result 4354 states and 11326 transitions. [2020-11-11 14:43:14,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-11 14:43:14,670 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-11 14:43:14,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:14,676 INFO L225 Difference]: With dead ends: 4354 [2020-11-11 14:43:14,676 INFO L226 Difference]: Without dead ends: 4202 [2020-11-11 14:43:14,677 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2020-11-11 14:43:14,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4202 states. [2020-11-11 14:43:14,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4202 to 2895. [2020-11-11 14:43:14,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2895 states, 2894 states have (on average 2.7380787836903937) internal successors, (7924), 2894 states have internal predecessors, (7924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:14,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2895 states to 2895 states and 7924 transitions. [2020-11-11 14:43:14,753 INFO L78 Accepts]: Start accepts. Automaton has 2895 states and 7924 transitions. Word has length 53 [2020-11-11 14:43:14,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:14,753 INFO L481 AbstractCegarLoop]: Abstraction has 2895 states and 7924 transitions. [2020-11-11 14:43:14,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:14,753 INFO L276 IsEmpty]: Start isEmpty. Operand 2895 states and 7924 transitions. [2020-11-11 14:43:14,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:14,758 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:14,759 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:43:14,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:14,975 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:14,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:14,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1250756246, now seen corresponding path program 7 times [2020-11-11 14:43:14,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:14,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530055009] [2020-11-11 14:43:14,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:14,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:15,108 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:15,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530055009] [2020-11-11 14:43:15,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561115616] [2020-11-11 14:43:15,108 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:15,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:15,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 14:43:15,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:15,336 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:15,346 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:15,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:15,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-11-11 14:43:15,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520608474] [2020-11-11 14:43:15,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 14:43:15,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:15,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 14:43:15,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-11-11 14:43:15,348 INFO L87 Difference]: Start difference. First operand 2895 states and 7924 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:15,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:15,805 INFO L93 Difference]: Finished difference Result 4768 states and 12272 transitions. [2020-11-11 14:43:15,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-11 14:43:15,806 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-11 14:43:15,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:15,813 INFO L225 Difference]: With dead ends: 4768 [2020-11-11 14:43:15,813 INFO L226 Difference]: Without dead ends: 4376 [2020-11-11 14:43:15,814 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=803, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 14:43:15,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4376 states. [2020-11-11 14:43:15,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4376 to 2985. [2020-11-11 14:43:15,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2985 states, 2984 states have (on average 2.7191689008042896) internal successors, (8114), 2984 states have internal predecessors, (8114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:15,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2985 states to 2985 states and 8114 transitions. [2020-11-11 14:43:15,891 INFO L78 Accepts]: Start accepts. Automaton has 2985 states and 8114 transitions. Word has length 53 [2020-11-11 14:43:15,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:15,891 INFO L481 AbstractCegarLoop]: Abstraction has 2985 states and 8114 transitions. [2020-11-11 14:43:15,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:15,892 INFO L276 IsEmpty]: Start isEmpty. Operand 2985 states and 8114 transitions. [2020-11-11 14:43:15,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:15,897 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:15,897 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:43:16,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-11 14:43:16,111 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:16,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:16,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1648872124, now seen corresponding path program 8 times [2020-11-11 14:43:16,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:16,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827744359] [2020-11-11 14:43:16,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:16,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:16,247 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:16,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827744359] [2020-11-11 14:43:16,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572743078] [2020-11-11 14:43:16,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:16,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 14:43:16,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:16,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 14:43:16,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:16,561 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:16,612 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:16,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:16,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-11-11 14:43:16,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468515435] [2020-11-11 14:43:16,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 14:43:16,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:16,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 14:43:16,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2020-11-11 14:43:16,615 INFO L87 Difference]: Start difference. First operand 2985 states and 8114 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:16,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:16,993 INFO L93 Difference]: Finished difference Result 4403 states and 11421 transitions. [2020-11-11 14:43:16,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-11 14:43:16,993 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-11 14:43:16,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:17,001 INFO L225 Difference]: With dead ends: 4403 [2020-11-11 14:43:17,001 INFO L226 Difference]: Without dead ends: 4251 [2020-11-11 14:43:17,001 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2020-11-11 14:43:17,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4251 states. [2020-11-11 14:43:17,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4251 to 2960. [2020-11-11 14:43:17,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2960 states, 2959 states have (on average 2.723555255153768) internal successors, (8059), 2959 states have internal predecessors, (8059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:17,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2960 states to 2960 states and 8059 transitions. [2020-11-11 14:43:17,090 INFO L78 Accepts]: Start accepts. Automaton has 2960 states and 8059 transitions. Word has length 53 [2020-11-11 14:43:17,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:17,091 INFO L481 AbstractCegarLoop]: Abstraction has 2960 states and 8059 transitions. [2020-11-11 14:43:17,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:17,091 INFO L276 IsEmpty]: Start isEmpty. Operand 2960 states and 8059 transitions. [2020-11-11 14:43:17,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:17,096 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:17,096 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:43:17,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-11 14:43:17,312 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:17,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:17,313 INFO L82 PathProgramCache]: Analyzing trace with hash 215220982, now seen corresponding path program 9 times [2020-11-11 14:43:17,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:17,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871613478] [2020-11-11 14:43:17,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:17,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:17,446 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:17,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871613478] [2020-11-11 14:43:17,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89545352] [2020-11-11 14:43:17,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:17,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-11 14:43:17,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:17,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 14:43:17,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:17,668 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:17,699 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:17,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:17,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-11-11 14:43:17,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972029344] [2020-11-11 14:43:17,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 14:43:17,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:17,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 14:43:17,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-11-11 14:43:17,701 INFO L87 Difference]: Start difference. First operand 2960 states and 8059 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:18,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:18,135 INFO L93 Difference]: Finished difference Result 4505 states and 11623 transitions. [2020-11-11 14:43:18,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-11 14:43:18,136 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-11 14:43:18,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:18,146 INFO L225 Difference]: With dead ends: 4505 [2020-11-11 14:43:18,146 INFO L226 Difference]: Without dead ends: 4353 [2020-11-11 14:43:18,148 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=256, Invalid=736, Unknown=0, NotChecked=0, Total=992 [2020-11-11 14:43:18,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4353 states. [2020-11-11 14:43:18,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4353 to 3060. [2020-11-11 14:43:18,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3060 states, 3059 states have (on average 2.7064400130761688) internal successors, (8279), 3059 states have internal predecessors, (8279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:18,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3060 states to 3060 states and 8279 transitions. [2020-11-11 14:43:18,230 INFO L78 Accepts]: Start accepts. Automaton has 3060 states and 8279 transitions. Word has length 53 [2020-11-11 14:43:18,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:18,231 INFO L481 AbstractCegarLoop]: Abstraction has 3060 states and 8279 transitions. [2020-11-11 14:43:18,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:18,231 INFO L276 IsEmpty]: Start isEmpty. Operand 3060 states and 8279 transitions. [2020-11-11 14:43:18,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:18,237 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:18,237 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:43:18,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-11-11 14:43:18,453 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:18,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:18,454 INFO L82 PathProgramCache]: Analyzing trace with hash -55700888, now seen corresponding path program 10 times [2020-11-11 14:43:18,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:18,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784915509] [2020-11-11 14:43:18,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:18,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:18,585 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:18,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784915509] [2020-11-11 14:43:18,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551084160] [2020-11-11 14:43:18,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:18,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 14:43:18,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:18,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 14:43:18,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:18,815 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:18,854 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:18,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:18,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-11-11 14:43:18,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2635323] [2020-11-11 14:43:18,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 14:43:18,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:18,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 14:43:18,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-11-11 14:43:18,856 INFO L87 Difference]: Start difference. First operand 3060 states and 8279 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:19,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:19,406 INFO L93 Difference]: Finished difference Result 4618 states and 11846 transitions. [2020-11-11 14:43:19,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-11 14:43:19,406 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-11 14:43:19,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:19,412 INFO L225 Difference]: With dead ends: 4618 [2020-11-11 14:43:19,412 INFO L226 Difference]: Without dead ends: 4466 [2020-11-11 14:43:19,413 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 14:43:19,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4466 states. [2020-11-11 14:43:19,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4466 to 3059. [2020-11-11 14:43:19,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3059 states, 3058 states have (on average 2.7050359712230216) internal successors, (8272), 3058 states have internal predecessors, (8272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:19,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 8272 transitions. [2020-11-11 14:43:19,487 INFO L78 Accepts]: Start accepts. Automaton has 3059 states and 8272 transitions. Word has length 53 [2020-11-11 14:43:19,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:19,487 INFO L481 AbstractCegarLoop]: Abstraction has 3059 states and 8272 transitions. [2020-11-11 14:43:19,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:19,487 INFO L276 IsEmpty]: Start isEmpty. Operand 3059 states and 8272 transitions. [2020-11-11 14:43:19,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:19,493 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:19,493 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:43:19,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-11-11 14:43:19,708 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:19,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:19,708 INFO L82 PathProgramCache]: Analyzing trace with hash 78654292, now seen corresponding path program 11 times [2020-11-11 14:43:19,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:19,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496798321] [2020-11-11 14:43:19,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:19,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:19,848 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:19,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496798321] [2020-11-11 14:43:19,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958377428] [2020-11-11 14:43:19,849 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:19,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 14:43:19,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:19,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 14:43:19,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:20,138 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:20,141 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:20,146 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:20,188 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:20,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:20,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-11-11 14:43:20,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409703889] [2020-11-11 14:43:20,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 14:43:20,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:20,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 14:43:20,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-11-11 14:43:20,191 INFO L87 Difference]: Start difference. First operand 3059 states and 8272 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:20,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:20,657 INFO L93 Difference]: Finished difference Result 4464 states and 11536 transitions. [2020-11-11 14:43:20,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-11 14:43:20,658 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-11 14:43:20,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:20,663 INFO L225 Difference]: With dead ends: 4464 [2020-11-11 14:43:20,663 INFO L226 Difference]: Without dead ends: 4312 [2020-11-11 14:43:20,664 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=237, Invalid=693, Unknown=0, NotChecked=0, Total=930 [2020-11-11 14:43:20,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4312 states. [2020-11-11 14:43:20,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4312 to 3009. [2020-11-11 14:43:20,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3009 states, 3008 states have (on average 2.71343085106383) internal successors, (8162), 3008 states have internal predecessors, (8162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:20,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3009 states to 3009 states and 8162 transitions. [2020-11-11 14:43:20,734 INFO L78 Accepts]: Start accepts. Automaton has 3009 states and 8162 transitions. Word has length 53 [2020-11-11 14:43:20,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:20,734 INFO L481 AbstractCegarLoop]: Abstraction has 3009 states and 8162 transitions. [2020-11-11 14:43:20,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:20,735 INFO L276 IsEmpty]: Start isEmpty. Operand 3009 states and 8162 transitions. [2020-11-11 14:43:20,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:20,740 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:20,741 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:43:20,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-11-11 14:43:20,954 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:20,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:20,954 INFO L82 PathProgramCache]: Analyzing trace with hash -425336602, now seen corresponding path program 12 times [2020-11-11 14:43:20,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:20,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175379907] [2020-11-11 14:43:20,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:20,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:21,105 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:21,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175379907] [2020-11-11 14:43:21,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019982593] [2020-11-11 14:43:21,106 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:21,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 14:43:21,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:21,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 14:43:21,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:21,353 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:21,358 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:21,363 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:21,406 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:21,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:21,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-11-11 14:43:21,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850756] [2020-11-11 14:43:21,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 14:43:21,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:21,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 14:43:21,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2020-11-11 14:43:21,409 INFO L87 Difference]: Start difference. First operand 3009 states and 8162 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:21,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:21,791 INFO L93 Difference]: Finished difference Result 4713 states and 12039 transitions. [2020-11-11 14:43:21,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-11 14:43:21,792 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-11 14:43:21,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:21,797 INFO L225 Difference]: With dead ends: 4713 [2020-11-11 14:43:21,797 INFO L226 Difference]: Without dead ends: 4561 [2020-11-11 14:43:21,798 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2020-11-11 14:43:21,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4561 states. [2020-11-11 14:43:21,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4561 to 3034. [2020-11-11 14:43:21,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3034 states, 3033 states have (on average 2.7091988130563798) internal successors, (8217), 3033 states have internal predecessors, (8217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:21,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3034 states to 3034 states and 8217 transitions. [2020-11-11 14:43:21,865 INFO L78 Accepts]: Start accepts. Automaton has 3034 states and 8217 transitions. Word has length 53 [2020-11-11 14:43:21,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:21,866 INFO L481 AbstractCegarLoop]: Abstraction has 3034 states and 8217 transitions. [2020-11-11 14:43:21,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:21,866 INFO L276 IsEmpty]: Start isEmpty. Operand 3034 states and 8217 transitions. [2020-11-11 14:43:21,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:21,871 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:21,872 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:43:22,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:22,085 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:22,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:22,086 INFO L82 PathProgramCache]: Analyzing trace with hash -2035604228, now seen corresponding path program 13 times [2020-11-11 14:43:22,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:22,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536343029] [2020-11-11 14:43:22,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:22,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:22,289 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:22,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536343029] [2020-11-11 14:43:22,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233050632] [2020-11-11 14:43:22,290 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:22,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:22,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 14:43:22,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:22,521 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:22,553 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:22,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:22,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-11-11 14:43:22,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808551948] [2020-11-11 14:43:22,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 14:43:22,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:22,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 14:43:22,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-11-11 14:43:22,556 INFO L87 Difference]: Start difference. First operand 3034 states and 8217 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:23,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:23,152 INFO L93 Difference]: Finished difference Result 5248 states and 13232 transitions. [2020-11-11 14:43:23,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-11 14:43:23,153 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-11 14:43:23,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:23,159 INFO L225 Difference]: With dead ends: 5248 [2020-11-11 14:43:23,159 INFO L226 Difference]: Without dead ends: 4856 [2020-11-11 14:43:23,160 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=298, Invalid=962, Unknown=0, NotChecked=0, Total=1260 [2020-11-11 14:43:23,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4856 states. [2020-11-11 14:43:23,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4856 to 3059. [2020-11-11 14:43:23,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3059 states, 3058 states have (on average 2.7050359712230216) internal successors, (8272), 3058 states have internal predecessors, (8272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:23,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 8272 transitions. [2020-11-11 14:43:23,239 INFO L78 Accepts]: Start accepts. Automaton has 3059 states and 8272 transitions. Word has length 53 [2020-11-11 14:43:23,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:23,239 INFO L481 AbstractCegarLoop]: Abstraction has 3059 states and 8272 transitions. [2020-11-11 14:43:23,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:23,239 INFO L276 IsEmpty]: Start isEmpty. Operand 3059 states and 8272 transitions. [2020-11-11 14:43:23,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:23,245 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:23,245 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:43:23,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:23,461 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:23,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:23,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1861247190, now seen corresponding path program 14 times [2020-11-11 14:43:23,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:23,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046063255] [2020-11-11 14:43:23,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:23,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:23,588 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:23,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046063255] [2020-11-11 14:43:23,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494910320] [2020-11-11 14:43:23,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:23,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 14:43:23,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:23,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 14:43:23,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:23,829 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:23,860 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:23,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:23,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-11-11 14:43:23,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430006228] [2020-11-11 14:43:23,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 14:43:23,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:23,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 14:43:23,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-11-11 14:43:23,862 INFO L87 Difference]: Start difference. First operand 3059 states and 8272 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:24,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:24,348 INFO L93 Difference]: Finished difference Result 4608 states and 11824 transitions. [2020-11-11 14:43:24,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 14:43:24,349 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-11 14:43:24,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:24,354 INFO L225 Difference]: With dead ends: 4608 [2020-11-11 14:43:24,354 INFO L226 Difference]: Without dead ends: 4456 [2020-11-11 14:43:24,355 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2020-11-11 14:43:24,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4456 states. [2020-11-11 14:43:24,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4456 to 2984. [2020-11-11 14:43:24,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2984 states, 2983 states have (on average 2.7177338250083807) internal successors, (8107), 2983 states have internal predecessors, (8107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:24,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2984 states to 2984 states and 8107 transitions. [2020-11-11 14:43:24,406 INFO L78 Accepts]: Start accepts. Automaton has 2984 states and 8107 transitions. Word has length 53 [2020-11-11 14:43:24,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:24,407 INFO L481 AbstractCegarLoop]: Abstraction has 2984 states and 8107 transitions. [2020-11-11 14:43:24,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:24,407 INFO L276 IsEmpty]: Start isEmpty. Operand 2984 states and 8107 transitions. [2020-11-11 14:43:24,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:24,410 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:24,410 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:43:24,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:24,616 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:24,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:24,617 INFO L82 PathProgramCache]: Analyzing trace with hash 2076656768, now seen corresponding path program 15 times [2020-11-11 14:43:24,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:24,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189558459] [2020-11-11 14:43:24,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:24,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:24,737 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:24,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189558459] [2020-11-11 14:43:24,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983813046] [2020-11-11 14:43:24,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:24,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-11 14:43:24,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:24,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 14:43:24,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:25,025 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:25,028 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:25,034 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:25,091 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:25,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:25,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-11-11 14:43:25,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149445713] [2020-11-11 14:43:25,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 14:43:25,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:25,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 14:43:25,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2020-11-11 14:43:25,094 INFO L87 Difference]: Start difference. First operand 2984 states and 8107 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:25,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:25,508 INFO L93 Difference]: Finished difference Result 4783 states and 12184 transitions. [2020-11-11 14:43:25,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 14:43:25,509 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-11 14:43:25,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:25,514 INFO L225 Difference]: With dead ends: 4783 [2020-11-11 14:43:25,514 INFO L226 Difference]: Without dead ends: 4631 [2020-11-11 14:43:25,515 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=228, Invalid=642, Unknown=0, NotChecked=0, Total=870 [2020-11-11 14:43:25,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4631 states. [2020-11-11 14:43:25,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4631 to 2984. [2020-11-11 14:43:25,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2984 states, 2983 states have (on average 2.7177338250083807) internal successors, (8107), 2983 states have internal predecessors, (8107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:25,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2984 states to 2984 states and 8107 transitions. [2020-11-11 14:43:25,566 INFO L78 Accepts]: Start accepts. Automaton has 2984 states and 8107 transitions. Word has length 53 [2020-11-11 14:43:25,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:25,567 INFO L481 AbstractCegarLoop]: Abstraction has 2984 states and 8107 transitions. [2020-11-11 14:43:25,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:25,567 INFO L276 IsEmpty]: Start isEmpty. Operand 2984 states and 8107 transitions. [2020-11-11 14:43:25,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:25,571 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:25,571 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:43:25,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-11-11 14:43:25,772 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:25,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:25,773 INFO L82 PathProgramCache]: Analyzing trace with hash 675391302, now seen corresponding path program 16 times [2020-11-11 14:43:25,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:25,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678476636] [2020-11-11 14:43:25,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:25,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:25,901 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:25,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678476636] [2020-11-11 14:43:25,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392291627] [2020-11-11 14:43:25,902 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:25,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 14:43:25,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:25,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:43:25,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:26,147 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:26,151 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:26,153 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:26,195 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:26,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:26,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-11-11 14:43:26,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237848710] [2020-11-11 14:43:26,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 14:43:26,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:26,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 14:43:26,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2020-11-11 14:43:26,197 INFO L87 Difference]: Start difference. First operand 2984 states and 8107 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:26,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:26,696 INFO L93 Difference]: Finished difference Result 4837 states and 12402 transitions. [2020-11-11 14:43:26,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 14:43:26,696 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-11 14:43:26,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:26,703 INFO L225 Difference]: With dead ends: 4837 [2020-11-11 14:43:26,703 INFO L226 Difference]: Without dead ends: 4685 [2020-11-11 14:43:26,704 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=240, Invalid=752, Unknown=0, NotChecked=0, Total=992 [2020-11-11 14:43:26,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4685 states. [2020-11-11 14:43:26,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4685 to 3034. [2020-11-11 14:43:26,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3034 states, 3033 states have (on average 2.7289812067260137) internal successors, (8277), 3033 states have internal predecessors, (8277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:26,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3034 states to 3034 states and 8277 transitions. [2020-11-11 14:43:26,776 INFO L78 Accepts]: Start accepts. Automaton has 3034 states and 8277 transitions. Word has length 53 [2020-11-11 14:43:26,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:26,777 INFO L481 AbstractCegarLoop]: Abstraction has 3034 states and 8277 transitions. [2020-11-11 14:43:26,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:26,777 INFO L276 IsEmpty]: Start isEmpty. Operand 3034 states and 8277 transitions. [2020-11-11 14:43:26,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:26,781 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:26,781 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:43:26,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:26,982 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:26,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:26,983 INFO L82 PathProgramCache]: Analyzing trace with hash -585613004, now seen corresponding path program 17 times [2020-11-11 14:43:26,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:26,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173949512] [2020-11-11 14:43:26,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:26,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:27,126 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:27,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173949512] [2020-11-11 14:43:27,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755608031] [2020-11-11 14:43:27,126 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:27,180 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 14:43:27,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:27,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 14:43:27,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:27,341 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 14:43:27,463 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:27,541 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:27,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:27,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-11-11 14:43:27,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400146553] [2020-11-11 14:43:27,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 14:43:27,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:27,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 14:43:27,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2020-11-11 14:43:27,544 INFO L87 Difference]: Start difference. First operand 3034 states and 8277 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:28,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:28,596 INFO L93 Difference]: Finished difference Result 6675 states and 17290 transitions. [2020-11-11 14:43:28,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 14:43:28,597 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-11 14:43:28,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:28,605 INFO L225 Difference]: With dead ends: 6675 [2020-11-11 14:43:28,606 INFO L226 Difference]: Without dead ends: 6135 [2020-11-11 14:43:28,606 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=429, Invalid=1463, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 14:43:28,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6135 states. [2020-11-11 14:43:28,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6135 to 2984. [2020-11-11 14:43:28,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2984 states, 2983 states have (on average 2.7177338250083807) internal successors, (8107), 2983 states have internal predecessors, (8107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:28,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2984 states to 2984 states and 8107 transitions. [2020-11-11 14:43:28,671 INFO L78 Accepts]: Start accepts. Automaton has 2984 states and 8107 transitions. Word has length 53 [2020-11-11 14:43:28,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:28,671 INFO L481 AbstractCegarLoop]: Abstraction has 2984 states and 8107 transitions. [2020-11-11 14:43:28,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:28,671 INFO L276 IsEmpty]: Start isEmpty. Operand 2984 states and 8107 transitions. [2020-11-11 14:43:28,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:28,675 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:28,675 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:43:28,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-11-11 14:43:28,876 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:28,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:28,877 INFO L82 PathProgramCache]: Analyzing trace with hash 609088912, now seen corresponding path program 18 times [2020-11-11 14:43:28,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:28,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187860263] [2020-11-11 14:43:28,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:28,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:29,006 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:29,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187860263] [2020-11-11 14:43:29,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105134551] [2020-11-11 14:43:29,007 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:29,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 14:43:29,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:29,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 14:43:29,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:29,237 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:29,246 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:29,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:29,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-11-11 14:43:29,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625391788] [2020-11-11 14:43:29,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 14:43:29,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:29,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 14:43:29,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-11-11 14:43:29,249 INFO L87 Difference]: Start difference. First operand 2984 states and 8107 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:29,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:29,974 INFO L93 Difference]: Finished difference Result 5800 states and 14610 transitions. [2020-11-11 14:43:29,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 14:43:29,974 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-11 14:43:29,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:29,981 INFO L225 Difference]: With dead ends: 5800 [2020-11-11 14:43:29,981 INFO L226 Difference]: Without dead ends: 5408 [2020-11-11 14:43:29,982 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=362, Invalid=1278, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 14:43:29,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5408 states. [2020-11-11 14:43:30,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5408 to 3131. [2020-11-11 14:43:30,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3131 states, 3130 states have (on average 2.737380191693291) internal successors, (8568), 3130 states have internal predecessors, (8568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:30,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3131 states to 3131 states and 8568 transitions. [2020-11-11 14:43:30,051 INFO L78 Accepts]: Start accepts. Automaton has 3131 states and 8568 transitions. Word has length 53 [2020-11-11 14:43:30,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:30,051 INFO L481 AbstractCegarLoop]: Abstraction has 3131 states and 8568 transitions. [2020-11-11 14:43:30,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:30,051 INFO L276 IsEmpty]: Start isEmpty. Operand 3131 states and 8568 transitions. [2020-11-11 14:43:30,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:30,094 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:30,094 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:43:30,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:30,296 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:30,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:30,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1993878554, now seen corresponding path program 19 times [2020-11-11 14:43:30,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:30,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532949851] [2020-11-11 14:43:30,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:30,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:30,429 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:30,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532949851] [2020-11-11 14:43:30,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774731606] [2020-11-11 14:43:30,430 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:30,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:30,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 14:43:30,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:30,654 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:30,683 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:30,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:30,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-11-11 14:43:30,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167832297] [2020-11-11 14:43:30,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 14:43:30,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:30,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 14:43:30,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2020-11-11 14:43:30,685 INFO L87 Difference]: Start difference. First operand 3131 states and 8568 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:31,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:31,514 INFO L93 Difference]: Finished difference Result 5826 states and 15125 transitions. [2020-11-11 14:43:31,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 14:43:31,515 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-11 14:43:31,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:31,522 INFO L225 Difference]: With dead ends: 5826 [2020-11-11 14:43:31,522 INFO L226 Difference]: Without dead ends: 5434 [2020-11-11 14:43:31,523 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=379, Invalid=1343, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 14:43:31,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5434 states. [2020-11-11 14:43:31,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5434 to 3261. [2020-11-11 14:43:31,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3261 states, 3260 states have (on average 2.752147239263804) internal successors, (8972), 3260 states have internal predecessors, (8972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:31,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3261 states to 3261 states and 8972 transitions. [2020-11-11 14:43:31,580 INFO L78 Accepts]: Start accepts. Automaton has 3261 states and 8972 transitions. Word has length 53 [2020-11-11 14:43:31,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:31,580 INFO L481 AbstractCegarLoop]: Abstraction has 3261 states and 8972 transitions. [2020-11-11 14:43:31,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:31,580 INFO L276 IsEmpty]: Start isEmpty. Operand 3261 states and 8972 transitions. [2020-11-11 14:43:31,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:31,585 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:31,585 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:43:31,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-11-11 14:43:31,799 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:31,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:31,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1035698142, now seen corresponding path program 20 times [2020-11-11 14:43:31,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:31,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682638492] [2020-11-11 14:43:31,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:31,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:31,937 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:31,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682638492] [2020-11-11 14:43:31,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647924744] [2020-11-11 14:43:31,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:31,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 14:43:31,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:31,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 14:43:32,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:32,111 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 14:43:32,130 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:32,138 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:32,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:32,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-11-11 14:43:32,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877104518] [2020-11-11 14:43:32,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 14:43:32,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:32,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 14:43:32,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2020-11-11 14:43:32,140 INFO L87 Difference]: Start difference. First operand 3261 states and 8972 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:33,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:33,393 INFO L93 Difference]: Finished difference Result 6994 states and 18294 transitions. [2020-11-11 14:43:33,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-11 14:43:33,393 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-11 14:43:33,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:33,402 INFO L225 Difference]: With dead ends: 6994 [2020-11-11 14:43:33,402 INFO L226 Difference]: Without dead ends: 6454 [2020-11-11 14:43:33,403 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=681, Invalid=2399, Unknown=0, NotChecked=0, Total=3080 [2020-11-11 14:43:33,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6454 states. [2020-11-11 14:43:33,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6454 to 3014. [2020-11-11 14:43:33,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3014 states, 3013 states have (on average 2.7066047129107202) internal successors, (8155), 3013 states have internal predecessors, (8155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:33,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3014 states to 3014 states and 8155 transitions. [2020-11-11 14:43:33,482 INFO L78 Accepts]: Start accepts. Automaton has 3014 states and 8155 transitions. Word has length 53 [2020-11-11 14:43:33,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:33,482 INFO L481 AbstractCegarLoop]: Abstraction has 3014 states and 8155 transitions. [2020-11-11 14:43:33,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:33,483 INFO L276 IsEmpty]: Start isEmpty. Operand 3014 states and 8155 transitions. [2020-11-11 14:43:33,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:33,487 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:33,487 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:43:33,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:33,688 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:33,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:33,689 INFO L82 PathProgramCache]: Analyzing trace with hash -198586930, now seen corresponding path program 21 times [2020-11-11 14:43:33,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:33,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92754772] [2020-11-11 14:43:33,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:33,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:33,836 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:33,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92754772] [2020-11-11 14:43:33,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778236790] [2020-11-11 14:43:33,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:33,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-11 14:43:33,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:33,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 14:43:33,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:34,066 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:34,105 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:34,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:34,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-11-11 14:43:34,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797908232] [2020-11-11 14:43:34,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 14:43:34,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:34,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 14:43:34,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-11-11 14:43:34,108 INFO L87 Difference]: Start difference. First operand 3014 states and 8155 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:34,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:34,855 INFO L93 Difference]: Finished difference Result 5480 states and 13668 transitions. [2020-11-11 14:43:34,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 14:43:34,856 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-11 14:43:34,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:34,864 INFO L225 Difference]: With dead ends: 5480 [2020-11-11 14:43:34,865 INFO L226 Difference]: Without dead ends: 5328 [2020-11-11 14:43:34,865 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=337, Invalid=1145, Unknown=0, NotChecked=0, Total=1482 [2020-11-11 14:43:34,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5328 states. [2020-11-11 14:43:34,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5328 to 3189. [2020-11-11 14:43:34,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3189 states, 3188 states have (on average 2.7164366373902133) internal successors, (8660), 3188 states have internal predecessors, (8660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:34,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3189 states to 3189 states and 8660 transitions. [2020-11-11 14:43:34,947 INFO L78 Accepts]: Start accepts. Automaton has 3189 states and 8660 transitions. Word has length 53 [2020-11-11 14:43:34,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:34,947 INFO L481 AbstractCegarLoop]: Abstraction has 3189 states and 8660 transitions. [2020-11-11 14:43:34,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:34,947 INFO L276 IsEmpty]: Start isEmpty. Operand 3189 states and 8660 transitions. [2020-11-11 14:43:34,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:34,951 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:34,952 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:43:35,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-11-11 14:43:35,164 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:35,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:35,165 INFO L82 PathProgramCache]: Analyzing trace with hash -469508800, now seen corresponding path program 22 times [2020-11-11 14:43:35,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:35,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920585882] [2020-11-11 14:43:35,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:35,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:35,312 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:35,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920585882] [2020-11-11 14:43:35,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211912665] [2020-11-11 14:43:35,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:35,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 14:43:35,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:35,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:43:35,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:35,554 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:35,584 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:35,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:35,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-11-11 14:43:35,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105169705] [2020-11-11 14:43:35,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 14:43:35,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:35,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 14:43:35,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-11-11 14:43:35,586 INFO L87 Difference]: Start difference. First operand 3189 states and 8660 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:36,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:36,478 INFO L93 Difference]: Finished difference Result 5655 states and 14013 transitions. [2020-11-11 14:43:36,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 14:43:36,479 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-11 14:43:36,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:36,485 INFO L225 Difference]: With dead ends: 5655 [2020-11-11 14:43:36,485 INFO L226 Difference]: Without dead ends: 5503 [2020-11-11 14:43:36,486 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=391, Invalid=1249, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 14:43:36,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5503 states. [2020-11-11 14:43:36,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5503 to 3221. [2020-11-11 14:43:36,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3221 states, 3220 states have (on average 2.717391304347826) internal successors, (8750), 3220 states have internal predecessors, (8750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:36,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3221 states to 3221 states and 8750 transitions. [2020-11-11 14:43:36,543 INFO L78 Accepts]: Start accepts. Automaton has 3221 states and 8750 transitions. Word has length 53 [2020-11-11 14:43:36,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:36,544 INFO L481 AbstractCegarLoop]: Abstraction has 3221 states and 8750 transitions. [2020-11-11 14:43:36,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:36,544 INFO L276 IsEmpty]: Start isEmpty. Operand 3221 states and 8750 transitions. [2020-11-11 14:43:36,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:36,547 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:36,547 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:43:36,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-11-11 14:43:36,747 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:36,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:36,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1190257276, now seen corresponding path program 23 times [2020-11-11 14:43:36,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:36,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868003222] [2020-11-11 14:43:36,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:36,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:36,891 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:36,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868003222] [2020-11-11 14:43:36,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282820856] [2020-11-11 14:43:36,891 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:36,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-11 14:43:36,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:36,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 14:43:36,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:37,119 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:37,147 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:37,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:37,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-11-11 14:43:37,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576489095] [2020-11-11 14:43:37,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 14:43:37,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:37,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 14:43:37,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-11-11 14:43:37,148 INFO L87 Difference]: Start difference. First operand 3221 states and 8750 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:38,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:38,053 INFO L93 Difference]: Finished difference Result 5533 states and 14016 transitions. [2020-11-11 14:43:38,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 14:43:38,054 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-11 14:43:38,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:38,061 INFO L225 Difference]: With dead ends: 5533 [2020-11-11 14:43:38,061 INFO L226 Difference]: Without dead ends: 5381 [2020-11-11 14:43:38,062 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=427, Invalid=1379, Unknown=0, NotChecked=0, Total=1806 [2020-11-11 14:43:38,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5381 states. [2020-11-11 14:43:38,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5381 to 3291. [2020-11-11 14:43:38,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3291 states, 3290 states have (on average 2.7337386018237084) internal successors, (8994), 3290 states have internal predecessors, (8994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:38,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3291 states to 3291 states and 8994 transitions. [2020-11-11 14:43:38,124 INFO L78 Accepts]: Start accepts. Automaton has 3291 states and 8994 transitions. Word has length 53 [2020-11-11 14:43:38,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:38,124 INFO L481 AbstractCegarLoop]: Abstraction has 3291 states and 8994 transitions. [2020-11-11 14:43:38,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:38,124 INFO L276 IsEmpty]: Start isEmpty. Operand 3291 states and 8994 transitions. [2020-11-11 14:43:38,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:38,129 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:38,129 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:43:38,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-11-11 14:43:38,337 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:38,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:38,338 INFO L82 PathProgramCache]: Analyzing trace with hash 194532366, now seen corresponding path program 24 times [2020-11-11 14:43:38,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:38,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059652860] [2020-11-11 14:43:38,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:38,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:38,487 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:38,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059652860] [2020-11-11 14:43:38,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4421210] [2020-11-11 14:43:38,487 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:38,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-11 14:43:38,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:38,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 14:43:38,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:38,718 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:38,751 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:38,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:38,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-11-11 14:43:38,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386132422] [2020-11-11 14:43:38,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 14:43:38,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:38,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 14:43:38,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-11-11 14:43:38,753 INFO L87 Difference]: Start difference. First operand 3291 states and 8994 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:39,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:39,612 INFO L93 Difference]: Finished difference Result 5620 states and 14607 transitions. [2020-11-11 14:43:39,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 14:43:39,612 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-11 14:43:39,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:39,619 INFO L225 Difference]: With dead ends: 5620 [2020-11-11 14:43:39,619 INFO L226 Difference]: Without dead ends: 5468 [2020-11-11 14:43:39,620 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=410, Invalid=1312, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 14:43:39,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5468 states. [2020-11-11 14:43:39,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5468 to 3371. [2020-11-11 14:43:39,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3371 states, 3370 states have (on average 2.743026706231454) internal successors, (9244), 3370 states have internal predecessors, (9244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:39,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3371 states to 3371 states and 9244 transitions. [2020-11-11 14:43:39,692 INFO L78 Accepts]: Start accepts. Automaton has 3371 states and 9244 transitions. Word has length 53 [2020-11-11 14:43:39,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:39,692 INFO L481 AbstractCegarLoop]: Abstraction has 3371 states and 9244 transitions. [2020-11-11 14:43:39,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:39,692 INFO L276 IsEmpty]: Start isEmpty. Operand 3371 states and 9244 transitions. [2020-11-11 14:43:39,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:39,697 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:39,697 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:43:39,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-11-11 14:43:39,911 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:39,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:39,911 INFO L82 PathProgramCache]: Analyzing trace with hash -763648046, now seen corresponding path program 25 times [2020-11-11 14:43:39,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:39,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554256188] [2020-11-11 14:43:39,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:39,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:40,051 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:40,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554256188] [2020-11-11 14:43:40,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584326968] [2020-11-11 14:43:40,052 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:40,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:40,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 14:43:40,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:40,242 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 14:43:40,289 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:40,318 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:40,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:40,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-11-11 14:43:40,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407294602] [2020-11-11 14:43:40,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 14:43:40,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:40,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 14:43:40,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-11-11 14:43:40,320 INFO L87 Difference]: Start difference. First operand 3371 states and 9244 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:41,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:41,891 INFO L93 Difference]: Finished difference Result 7268 states and 19001 transitions. [2020-11-11 14:43:41,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-11-11 14:43:41,891 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-11 14:43:41,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:41,900 INFO L225 Difference]: With dead ends: 7268 [2020-11-11 14:43:41,900 INFO L226 Difference]: Without dead ends: 6680 [2020-11-11 14:43:41,901 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=739, Invalid=2683, Unknown=0, NotChecked=0, Total=3422 [2020-11-11 14:43:41,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6680 states. [2020-11-11 14:43:41,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6680 to 3309. [2020-11-11 14:43:41,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3309 states, 3308 states have (on average 2.712212817412334) internal successors, (8972), 3308 states have internal predecessors, (8972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:41,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3309 states to 3309 states and 8972 transitions. [2020-11-11 14:43:41,966 INFO L78 Accepts]: Start accepts. Automaton has 3309 states and 8972 transitions. Word has length 53 [2020-11-11 14:43:41,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:41,966 INFO L481 AbstractCegarLoop]: Abstraction has 3309 states and 8972 transitions. [2020-11-11 14:43:41,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:41,966 INFO L276 IsEmpty]: Start isEmpty. Operand 3309 states and 8972 transitions. [2020-11-11 14:43:41,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:41,969 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:41,969 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:43:42,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:42,170 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:42,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:42,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1355550908, now seen corresponding path program 26 times [2020-11-11 14:43:42,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:42,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151047557] [2020-11-11 14:43:42,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:42,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:42,337 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:42,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151047557] [2020-11-11 14:43:42,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155533259] [2020-11-11 14:43:42,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:42,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 14:43:42,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:42,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 14:43:42,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:42,574 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:42,612 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:42,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:42,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-11-11 14:43:42,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127228115] [2020-11-11 14:43:42,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 14:43:42,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:42,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 14:43:42,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-11-11 14:43:42,615 INFO L87 Difference]: Start difference. First operand 3309 states and 8972 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:43,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:43,733 INFO L93 Difference]: Finished difference Result 5941 states and 14921 transitions. [2020-11-11 14:43:43,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-11 14:43:43,734 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-11 14:43:43,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:43,741 INFO L225 Difference]: With dead ends: 5941 [2020-11-11 14:43:43,741 INFO L226 Difference]: Without dead ends: 5789 [2020-11-11 14:43:43,742 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=533, Invalid=1723, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 14:43:43,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5789 states. [2020-11-11 14:43:43,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5789 to 3367. [2020-11-11 14:43:43,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3367 states, 3366 states have (on average 2.7332144979203803) internal successors, (9200), 3366 states have internal predecessors, (9200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:43,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3367 states to 3367 states and 9200 transitions. [2020-11-11 14:43:43,804 INFO L78 Accepts]: Start accepts. Automaton has 3367 states and 9200 transitions. Word has length 53 [2020-11-11 14:43:43,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:43,804 INFO L481 AbstractCegarLoop]: Abstraction has 3367 states and 9200 transitions. [2020-11-11 14:43:43,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:43,805 INFO L276 IsEmpty]: Start isEmpty. Operand 3367 states and 9200 transitions. [2020-11-11 14:43:43,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:43,809 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:43,809 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:43:44,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-11-11 14:43:44,024 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:44,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:44,024 INFO L82 PathProgramCache]: Analyzing trace with hash 385888988, now seen corresponding path program 27 times [2020-11-11 14:43:44,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:44,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367699684] [2020-11-11 14:43:44,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:44,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:44,172 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:44,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367699684] [2020-11-11 14:43:44,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710774048] [2020-11-11 14:43:44,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:44,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-11 14:43:44,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:44,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 14:43:44,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:44,411 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:44,443 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:44,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:44,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-11-11 14:43:44,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559365637] [2020-11-11 14:43:44,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 14:43:44,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:44,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 14:43:44,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2020-11-11 14:43:44,445 INFO L87 Difference]: Start difference. First operand 3367 states and 9200 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:45,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:45,557 INFO L93 Difference]: Finished difference Result 6042 states and 15758 transitions. [2020-11-11 14:43:45,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-11 14:43:45,558 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-11 14:43:45,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:45,565 INFO L225 Difference]: With dead ends: 6042 [2020-11-11 14:43:45,566 INFO L226 Difference]: Without dead ends: 5890 [2020-11-11 14:43:45,566 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=498, Invalid=1572, Unknown=0, NotChecked=0, Total=2070 [2020-11-11 14:43:45,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5890 states. [2020-11-11 14:43:45,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5890 to 3519. [2020-11-11 14:43:45,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3519 states, 3518 states have (on average 2.74076179647527) internal successors, (9642), 3518 states have internal predecessors, (9642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:45,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3519 states to 3519 states and 9642 transitions. [2020-11-11 14:43:45,642 INFO L78 Accepts]: Start accepts. Automaton has 3519 states and 9642 transitions. Word has length 53 [2020-11-11 14:43:45,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:45,642 INFO L481 AbstractCegarLoop]: Abstraction has 3519 states and 9642 transitions. [2020-11-11 14:43:45,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:45,642 INFO L276 IsEmpty]: Start isEmpty. Operand 3519 states and 9642 transitions. [2020-11-11 14:43:45,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:45,646 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:45,646 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:43:45,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-11-11 14:43:45,854 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:45,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:45,854 INFO L82 PathProgramCache]: Analyzing trace with hash -572291424, now seen corresponding path program 28 times [2020-11-11 14:43:45,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:45,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38942651] [2020-11-11 14:43:45,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:45,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:46,000 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:46,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38942651] [2020-11-11 14:43:46,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284129838] [2020-11-11 14:43:46,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:46,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 14:43:46,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:46,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:43:46,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:46,248 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 14:43:46,327 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:46,359 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:46,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:46,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-11-11 14:43:46,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405656964] [2020-11-11 14:43:46,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 14:43:46,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:46,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 14:43:46,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-11-11 14:43:46,361 INFO L87 Difference]: Start difference. First operand 3519 states and 9642 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:48,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:48,498 INFO L93 Difference]: Finished difference Result 8072 states and 21081 transitions. [2020-11-11 14:43:48,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-11-11 14:43:48,498 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-11 14:43:48,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:48,508 INFO L225 Difference]: With dead ends: 8072 [2020-11-11 14:43:48,508 INFO L226 Difference]: Without dead ends: 7274 [2020-11-11 14:43:48,510 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1357 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=883, Invalid=3277, Unknown=0, NotChecked=0, Total=4160 [2020-11-11 14:43:48,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7274 states. [2020-11-11 14:43:48,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7274 to 3349. [2020-11-11 14:43:48,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3349 states, 3348 states have (on average 2.7135603345280765) internal successors, (9085), 3348 states have internal predecessors, (9085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:48,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3349 states to 3349 states and 9085 transitions. [2020-11-11 14:43:48,581 INFO L78 Accepts]: Start accepts. Automaton has 3349 states and 9085 transitions. Word has length 53 [2020-11-11 14:43:48,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:48,582 INFO L481 AbstractCegarLoop]: Abstraction has 3349 states and 9085 transitions. [2020-11-11 14:43:48,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:48,582 INFO L276 IsEmpty]: Start isEmpty. Operand 3349 states and 9085 transitions. [2020-11-11 14:43:48,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:43:48,585 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:48,585 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:43:48,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:48,786 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:48,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:48,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1449809277, now seen corresponding path program 29 times [2020-11-11 14:43:48,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:48,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193327933] [2020-11-11 14:43:48,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:48,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:48,970 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:48,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193327933] [2020-11-11 14:43:48,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771905654] [2020-11-11 14:43:48,970 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:49,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-11 14:43:49,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:49,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:43:49,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:49,221 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:49,228 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:49,232 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:49,282 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:49,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:49,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:43:49,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353577793] [2020-11-11 14:43:49,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:43:49,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:49,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:43:49,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:43:49,285 INFO L87 Difference]: Start difference. First operand 3349 states and 9085 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:49,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:49,730 INFO L93 Difference]: Finished difference Result 4999 states and 12806 transitions. [2020-11-11 14:43:49,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 14:43:49,730 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:43:49,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:49,738 INFO L225 Difference]: With dead ends: 4999 [2020-11-11 14:43:49,738 INFO L226 Difference]: Without dead ends: 4847 [2020-11-11 14:43:49,738 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=263, Invalid=667, Unknown=0, NotChecked=0, Total=930 [2020-11-11 14:43:49,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4847 states. [2020-11-11 14:43:49,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4847 to 3424. [2020-11-11 14:43:49,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3424 states, 3423 states have (on average 2.7023079170318436) internal successors, (9250), 3423 states have internal predecessors, (9250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:49,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3424 states to 3424 states and 9250 transitions. [2020-11-11 14:43:49,817 INFO L78 Accepts]: Start accepts. Automaton has 3424 states and 9250 transitions. Word has length 58 [2020-11-11 14:43:49,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:49,818 INFO L481 AbstractCegarLoop]: Abstraction has 3424 states and 9250 transitions. [2020-11-11 14:43:49,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:49,818 INFO L276 IsEmpty]: Start isEmpty. Operand 3424 states and 9250 transitions. [2020-11-11 14:43:49,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:43:49,821 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:49,822 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:43:50,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-11-11 14:43:50,022 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:50,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:50,023 INFO L82 PathProgramCache]: Analyzing trace with hash -160458349, now seen corresponding path program 30 times [2020-11-11 14:43:50,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:50,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636622987] [2020-11-11 14:43:50,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:50,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:50,225 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:50,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636622987] [2020-11-11 14:43:50,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614671846] [2020-11-11 14:43:50,225 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:50,288 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-11 14:43:50,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:50,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:43:50,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:50,538 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:50,541 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:50,543 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:50,587 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:50,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:50,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:43:50,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381253165] [2020-11-11 14:43:50,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:43:50,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:50,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:43:50,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:43:50,589 INFO L87 Difference]: Start difference. First operand 3424 states and 9250 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:51,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:51,196 INFO L93 Difference]: Finished difference Result 5224 states and 13253 transitions. [2020-11-11 14:43:51,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-11 14:43:51,196 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:43:51,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:51,203 INFO L225 Difference]: With dead ends: 5224 [2020-11-11 14:43:51,203 INFO L226 Difference]: Without dead ends: 5072 [2020-11-11 14:43:51,203 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=291, Invalid=765, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 14:43:51,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5072 states. [2020-11-11 14:43:51,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5072 to 3439. [2020-11-11 14:43:51,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3439 states, 3438 states have (on average 2.700116346713205) internal successors, (9283), 3438 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:51,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3439 states to 3439 states and 9283 transitions. [2020-11-11 14:43:51,259 INFO L78 Accepts]: Start accepts. Automaton has 3439 states and 9283 transitions. Word has length 58 [2020-11-11 14:43:51,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:51,259 INFO L481 AbstractCegarLoop]: Abstraction has 3439 states and 9283 transitions. [2020-11-11 14:43:51,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:51,259 INFO L276 IsEmpty]: Start isEmpty. Operand 3439 states and 9283 transitions. [2020-11-11 14:43:51,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:43:51,263 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:51,263 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:43:51,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:51,464 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:51,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:51,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1305518879, now seen corresponding path program 31 times [2020-11-11 14:43:51,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:51,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345066201] [2020-11-11 14:43:51,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:51,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:51,626 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:51,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345066201] [2020-11-11 14:43:51,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498762184] [2020-11-11 14:43:51,627 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:51,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:51,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:43:51,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:51,893 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:51,925 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:51,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:51,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:43:51,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016584806] [2020-11-11 14:43:51,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:43:51,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:51,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:43:51,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:43:51,927 INFO L87 Difference]: Start difference. First operand 3439 states and 9283 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:52,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:52,482 INFO L93 Difference]: Finished difference Result 5293 states and 13384 transitions. [2020-11-11 14:43:52,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 14:43:52,482 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:43:52,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:52,489 INFO L225 Difference]: With dead ends: 5293 [2020-11-11 14:43:52,489 INFO L226 Difference]: Without dead ends: 5141 [2020-11-11 14:43:52,489 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=312, Invalid=878, Unknown=0, NotChecked=0, Total=1190 [2020-11-11 14:43:52,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5141 states. [2020-11-11 14:43:52,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5141 to 3564. [2020-11-11 14:43:52,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3564 states, 3563 states have (on average 2.682570867246702) internal successors, (9558), 3563 states have internal predecessors, (9558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:52,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3564 states to 3564 states and 9558 transitions. [2020-11-11 14:43:52,549 INFO L78 Accepts]: Start accepts. Automaton has 3564 states and 9558 transitions. Word has length 58 [2020-11-11 14:43:52,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:52,549 INFO L481 AbstractCegarLoop]: Abstraction has 3564 states and 9558 transitions. [2020-11-11 14:43:52,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:52,549 INFO L276 IsEmpty]: Start isEmpty. Operand 3564 states and 9558 transitions. [2020-11-11 14:43:52,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:43:52,552 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:52,552 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:43:52,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-11-11 14:43:52,753 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:52,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:52,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1034597009, now seen corresponding path program 32 times [2020-11-11 14:43:52,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:52,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035056887] [2020-11-11 14:43:52,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:52,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:52,986 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:52,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035056887] [2020-11-11 14:43:52,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697963776] [2020-11-11 14:43:52,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:53,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 14:43:53,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:53,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:43:53,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:53,284 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:53,316 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:53,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:53,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:43:53,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2906973] [2020-11-11 14:43:53,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:43:53,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:53,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:43:53,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:43:53,318 INFO L87 Difference]: Start difference. First operand 3564 states and 9558 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:54,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:54,120 INFO L93 Difference]: Finished difference Result 5688 states and 14317 transitions. [2020-11-11 14:43:54,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 14:43:54,120 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:43:54,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:54,128 INFO L225 Difference]: With dead ends: 5688 [2020-11-11 14:43:54,129 INFO L226 Difference]: Without dead ends: 5296 [2020-11-11 14:43:54,129 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=377, Invalid=1183, Unknown=0, NotChecked=0, Total=1560 [2020-11-11 14:43:54,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5296 states. [2020-11-11 14:43:54,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5296 to 3604. [2020-11-11 14:43:54,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3604 states, 3603 states have (on average 2.674993061337774) internal successors, (9638), 3603 states have internal predecessors, (9638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:54,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3604 states to 3604 states and 9638 transitions. [2020-11-11 14:43:54,188 INFO L78 Accepts]: Start accepts. Automaton has 3604 states and 9638 transitions. Word has length 58 [2020-11-11 14:43:54,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:54,188 INFO L481 AbstractCegarLoop]: Abstraction has 3604 states and 9638 transitions. [2020-11-11 14:43:54,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:54,188 INFO L276 IsEmpty]: Start isEmpty. Operand 3604 states and 9638 transitions. [2020-11-11 14:43:54,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:43:54,191 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:54,191 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:43:54,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-11-11 14:43:54,392 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:54,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:54,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1168952189, now seen corresponding path program 33 times [2020-11-11 14:43:54,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:54,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318179863] [2020-11-11 14:43:54,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:54,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:54,567 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:54,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318179863] [2020-11-11 14:43:54,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583203581] [2020-11-11 14:43:54,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:54,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-11 14:43:54,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:54,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:43:54,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:54,856 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:54,859 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:54,863 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:54,924 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:54,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:54,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:43:54,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653705920] [2020-11-11 14:43:54,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:43:54,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:54,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:43:54,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:43:54,926 INFO L87 Difference]: Start difference. First operand 3604 states and 9638 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:55,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:55,627 INFO L93 Difference]: Finished difference Result 5394 states and 13603 transitions. [2020-11-11 14:43:55,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 14:43:55,627 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:43:55,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:55,634 INFO L225 Difference]: With dead ends: 5394 [2020-11-11 14:43:55,634 INFO L226 Difference]: Without dead ends: 5242 [2020-11-11 14:43:55,634 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=363, Invalid=1043, Unknown=0, NotChecked=0, Total=1406 [2020-11-11 14:43:55,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5242 states. [2020-11-11 14:43:55,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5242 to 3579. [2020-11-11 14:43:55,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3579 states, 3578 states have (on average 2.678311906092789) internal successors, (9583), 3578 states have internal predecessors, (9583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:55,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3579 states to 3579 states and 9583 transitions. [2020-11-11 14:43:55,691 INFO L78 Accepts]: Start accepts. Automaton has 3579 states and 9583 transitions. Word has length 58 [2020-11-11 14:43:55,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:55,692 INFO L481 AbstractCegarLoop]: Abstraction has 3579 states and 9583 transitions. [2020-11-11 14:43:55,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:55,692 INFO L276 IsEmpty]: Start isEmpty. Operand 3579 states and 9583 transitions. [2020-11-11 14:43:55,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:43:55,695 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:55,695 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:43:55,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-11-11 14:43:55,896 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:55,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:55,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1248612077, now seen corresponding path program 34 times [2020-11-11 14:43:55,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:55,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172573043] [2020-11-11 14:43:55,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:55,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:56,091 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:56,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172573043] [2020-11-11 14:43:56,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284879715] [2020-11-11 14:43:56,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:56,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 14:43:56,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:56,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:43:56,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:56,361 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:56,399 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:56,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:56,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:43:56,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715262820] [2020-11-11 14:43:56,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:43:56,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:56,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:43:56,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:43:56,401 INFO L87 Difference]: Start difference. First operand 3579 states and 9583 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:57,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:57,114 INFO L93 Difference]: Finished difference Result 5351 states and 13510 transitions. [2020-11-11 14:43:57,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 14:43:57,115 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:43:57,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:57,122 INFO L225 Difference]: With dead ends: 5351 [2020-11-11 14:43:57,122 INFO L226 Difference]: Without dead ends: 5199 [2020-11-11 14:43:57,122 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=365, Invalid=1041, Unknown=0, NotChecked=0, Total=1406 [2020-11-11 14:43:57,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5199 states. [2020-11-11 14:43:57,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5199 to 3709. [2020-11-11 14:43:57,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3709 states, 3708 states have (on average 2.6615426105717366) internal successors, (9869), 3708 states have internal predecessors, (9869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:57,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3709 states to 3709 states and 9869 transitions. [2020-11-11 14:43:57,184 INFO L78 Accepts]: Start accepts. Automaton has 3709 states and 9869 transitions. Word has length 58 [2020-11-11 14:43:57,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:57,184 INFO L481 AbstractCegarLoop]: Abstraction has 3709 states and 9869 transitions. [2020-11-11 14:43:57,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:57,185 INFO L276 IsEmpty]: Start isEmpty. Operand 3709 states and 9869 transitions. [2020-11-11 14:43:57,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:43:57,188 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:57,189 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:43:57,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-11-11 14:43:57,389 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:57,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:57,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1519533947, now seen corresponding path program 35 times [2020-11-11 14:43:57,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:57,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545630471] [2020-11-11 14:43:57,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:57,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:57,556 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:57,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545630471] [2020-11-11 14:43:57,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996172672] [2020-11-11 14:43:57,557 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:57,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-11 14:43:57,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:57,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:43:57,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:57,813 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:57,849 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:57,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:57,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:43:57,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150837731] [2020-11-11 14:43:57,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:43:57,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:57,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:43:57,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:43:57,851 INFO L87 Difference]: Start difference. First operand 3709 states and 9869 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:58,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:58,703 INFO L93 Difference]: Finished difference Result 5624 states and 14053 transitions. [2020-11-11 14:43:58,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 14:43:58,704 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:43:58,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:58,711 INFO L225 Difference]: With dead ends: 5624 [2020-11-11 14:43:58,711 INFO L226 Difference]: Without dead ends: 5472 [2020-11-11 14:43:58,712 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=432, Invalid=1208, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 14:43:58,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5472 states. [2020-11-11 14:43:58,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5472 to 3734. [2020-11-11 14:43:58,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3734 states, 3733 states have (on average 2.658451647468524) internal successors, (9924), 3733 states have internal predecessors, (9924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:58,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3734 states to 3734 states and 9924 transitions. [2020-11-11 14:43:58,778 INFO L78 Accepts]: Start accepts. Automaton has 3734 states and 9924 transitions. Word has length 58 [2020-11-11 14:43:58,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:58,778 INFO L481 AbstractCegarLoop]: Abstraction has 3734 states and 9924 transitions. [2020-11-11 14:43:58,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:58,778 INFO L276 IsEmpty]: Start isEmpty. Operand 3734 states and 9924 transitions. [2020-11-11 14:43:58,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:43:58,782 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:58,782 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:43:58,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:58,996 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:58,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:58,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1847336437, now seen corresponding path program 11 times [2020-11-11 14:43:58,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:58,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853762962] [2020-11-11 14:43:58,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:59,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:59,160 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:59,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853762962] [2020-11-11 14:43:59,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104808871] [2020-11-11 14:43:59,161 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:59,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-11 14:43:59,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:59,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:43:59,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:59,465 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:59,499 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:59,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:59,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:43:59,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662310766] [2020-11-11 14:43:59,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:43:59,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:59,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:43:59,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:43:59,500 INFO L87 Difference]: Start difference. First operand 3734 states and 9924 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:00,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:44:00,347 INFO L93 Difference]: Finished difference Result 5559 states and 14054 transitions. [2020-11-11 14:44:00,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 14:44:00,347 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:44:00,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:44:00,355 INFO L225 Difference]: With dead ends: 5559 [2020-11-11 14:44:00,355 INFO L226 Difference]: Without dead ends: 5167 [2020-11-11 14:44:00,355 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=409, Invalid=1313, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 14:44:00,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5167 states. [2020-11-11 14:44:00,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5167 to 3758. [2020-11-11 14:44:00,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3758 states, 3757 states have (on average 2.6521160500399255) internal successors, (9964), 3757 states have internal predecessors, (9964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:00,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3758 states to 3758 states and 9964 transitions. [2020-11-11 14:44:00,417 INFO L78 Accepts]: Start accepts. Automaton has 3758 states and 9964 transitions. Word has length 58 [2020-11-11 14:44:00,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:44:00,417 INFO L481 AbstractCegarLoop]: Abstraction has 3758 states and 9964 transitions. [2020-11-11 14:44:00,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:00,417 INFO L276 IsEmpty]: Start isEmpty. Operand 3758 states and 9964 transitions. [2020-11-11 14:44:00,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:44:00,421 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:44:00,421 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:44:00,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-11-11 14:44:00,622 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:44:00,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:44:00,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1499500443, now seen corresponding path program 36 times [2020-11-11 14:44:00,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:44:00,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777343700] [2020-11-11 14:44:00,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:44:00,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:44:00,791 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:00,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777343700] [2020-11-11 14:44:00,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032822133] [2020-11-11 14:44:00,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:44:00,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-11 14:44:00,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:44:00,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:44:00,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:44:01,129 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:01,133 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:01,137 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:01,186 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:01,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:44:01,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:44:01,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082001581] [2020-11-11 14:44:01,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:44:01,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:44:01,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:44:01,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:44:01,188 INFO L87 Difference]: Start difference. First operand 3758 states and 9964 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:01,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:44:01,986 INFO L93 Difference]: Finished difference Result 5260 states and 13313 transitions. [2020-11-11 14:44:01,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 14:44:01,986 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:44:01,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:44:01,993 INFO L225 Difference]: With dead ends: 5260 [2020-11-11 14:44:01,993 INFO L226 Difference]: Without dead ends: 5108 [2020-11-11 14:44:01,993 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=342, Invalid=990, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 14:44:02,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5108 states. [2020-11-11 14:44:02,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5108 to 3693. [2020-11-11 14:44:02,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3693 states, 3692 states have (on average 2.6600758396533046) internal successors, (9821), 3692 states have internal predecessors, (9821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:02,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3693 states to 3693 states and 9821 transitions. [2020-11-11 14:44:02,050 INFO L78 Accepts]: Start accepts. Automaton has 3693 states and 9821 transitions. Word has length 58 [2020-11-11 14:44:02,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:44:02,050 INFO L481 AbstractCegarLoop]: Abstraction has 3693 states and 9821 transitions. [2020-11-11 14:44:02,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:02,050 INFO L276 IsEmpty]: Start isEmpty. Operand 3693 states and 9821 transitions. [2020-11-11 14:44:02,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:44:02,053 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:44:02,054 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:44:02,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:44:02,256 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:44:02,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:44:02,257 INFO L82 PathProgramCache]: Analyzing trace with hash -507996885, now seen corresponding path program 37 times [2020-11-11 14:44:02,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:44:02,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284996733] [2020-11-11 14:44:02,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:44:02,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:44:02,433 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:02,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284996733] [2020-11-11 14:44:02,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009677084] [2020-11-11 14:44:02,434 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:44:02,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:44:02,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:44:02,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:44:02,723 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:02,726 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:02,729 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:02,796 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:02,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:44:02,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:44:02,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588643696] [2020-11-11 14:44:02,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:44:02,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:44:02,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:44:02,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:44:02,800 INFO L87 Difference]: Start difference. First operand 3693 states and 9821 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:03,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:44:03,305 INFO L93 Difference]: Finished difference Result 5543 states and 13902 transitions. [2020-11-11 14:44:03,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-11 14:44:03,305 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:44:03,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:44:03,312 INFO L225 Difference]: With dead ends: 5543 [2020-11-11 14:44:03,312 INFO L226 Difference]: Without dead ends: 5391 [2020-11-11 14:44:03,312 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2020-11-11 14:44:03,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5391 states. [2020-11-11 14:44:03,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5391 to 3743. [2020-11-11 14:44:03,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3743 states, 3742 states have (on average 2.653928380545163) internal successors, (9931), 3742 states have internal predecessors, (9931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:03,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3743 states to 3743 states and 9931 transitions. [2020-11-11 14:44:03,372 INFO L78 Accepts]: Start accepts. Automaton has 3743 states and 9931 transitions. Word has length 58 [2020-11-11 14:44:03,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:44:03,372 INFO L481 AbstractCegarLoop]: Abstraction has 3743 states and 9931 transitions. [2020-11-11 14:44:03,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:03,372 INFO L276 IsEmpty]: Start isEmpty. Operand 3743 states and 9931 transitions. [2020-11-11 14:44:03,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:44:03,377 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:44:03,377 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:44:03,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-11-11 14:44:03,591 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:44:03,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:44:03,591 INFO L82 PathProgramCache]: Analyzing trace with hash -2118264511, now seen corresponding path program 38 times [2020-11-11 14:44:03,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:44:03,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656729726] [2020-11-11 14:44:03,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:44:03,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:44:03,750 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:03,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656729726] [2020-11-11 14:44:03,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830001142] [2020-11-11 14:44:03,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:44:03,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 14:44:03,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:44:03,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:44:03,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:44:04,043 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:04,045 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:04,047 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:04,091 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:04,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:44:04,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:44:04,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100330988] [2020-11-11 14:44:04,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:44:04,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:44:04,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:44:04,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:44:04,093 INFO L87 Difference]: Start difference. First operand 3743 states and 9931 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:04,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:44:04,842 INFO L93 Difference]: Finished difference Result 5873 states and 14564 transitions. [2020-11-11 14:44:04,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 14:44:04,843 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:44:04,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:44:04,850 INFO L225 Difference]: With dead ends: 5873 [2020-11-11 14:44:04,850 INFO L226 Difference]: Without dead ends: 5721 [2020-11-11 14:44:04,850 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=340, Invalid=920, Unknown=0, NotChecked=0, Total=1260 [2020-11-11 14:44:04,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5721 states. [2020-11-11 14:44:04,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5721 to 3743. [2020-11-11 14:44:04,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3743 states, 3742 states have (on average 2.653928380545163) internal successors, (9931), 3742 states have internal predecessors, (9931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:04,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3743 states to 3743 states and 9931 transitions. [2020-11-11 14:44:04,911 INFO L78 Accepts]: Start accepts. Automaton has 3743 states and 9931 transitions. Word has length 58 [2020-11-11 14:44:04,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:44:04,911 INFO L481 AbstractCegarLoop]: Abstraction has 3743 states and 9931 transitions. [2020-11-11 14:44:04,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:04,911 INFO L276 IsEmpty]: Start isEmpty. Operand 3743 states and 9931 transitions. [2020-11-11 14:44:04,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:44:04,915 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:44:04,915 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:44:05,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-11-11 14:44:05,116 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:44:05,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:44:05,116 INFO L82 PathProgramCache]: Analyzing trace with hash -652287283, now seen corresponding path program 39 times [2020-11-11 14:44:05,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:44:05,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862023672] [2020-11-11 14:44:05,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:44:05,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:44:05,274 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:05,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862023672] [2020-11-11 14:44:05,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636468416] [2020-11-11 14:44:05,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:44:05,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-11 14:44:05,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:44:05,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:44:05,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:44:05,545 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:05,579 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:05,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:44:05,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:44:05,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828477896] [2020-11-11 14:44:05,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:44:05,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:44:05,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:44:05,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:44:05,581 INFO L87 Difference]: Start difference. First operand 3743 states and 9931 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:06,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:44:06,510 INFO L93 Difference]: Finished difference Result 5934 states and 14671 transitions. [2020-11-11 14:44:06,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-11 14:44:06,511 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:44:06,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:44:06,518 INFO L225 Difference]: With dead ends: 5934 [2020-11-11 14:44:06,519 INFO L226 Difference]: Without dead ends: 5782 [2020-11-11 14:44:06,519 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=413, Invalid=1227, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 14:44:06,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5782 states. [2020-11-11 14:44:06,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5782 to 3818. [2020-11-11 14:44:06,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3818 states, 3817 states have (on average 2.6450091695048465) internal successors, (10096), 3817 states have internal predecessors, (10096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:06,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3818 states to 3818 states and 10096 transitions. [2020-11-11 14:44:06,598 INFO L78 Accepts]: Start accepts. Automaton has 3818 states and 10096 transitions. Word has length 58 [2020-11-11 14:44:06,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:44:06,599 INFO L481 AbstractCegarLoop]: Abstraction has 3818 states and 10096 transitions. [2020-11-11 14:44:06,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:06,599 INFO L276 IsEmpty]: Start isEmpty. Operand 3818 states and 10096 transitions. [2020-11-11 14:44:06,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:44:06,603 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:44:06,603 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:44:06,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:44:06,804 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:44:06,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:44:06,805 INFO L82 PathProgramCache]: Analyzing trace with hash -923209153, now seen corresponding path program 40 times [2020-11-11 14:44:06,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:44:06,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43040936] [2020-11-11 14:44:06,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:44:06,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:44:06,959 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:06,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43040936] [2020-11-11 14:44:06,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887764522] [2020-11-11 14:44:06,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:44:07,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 14:44:07,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:44:07,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:44:07,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:44:07,313 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:07,364 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:07,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:44:07,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:44:07,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780184632] [2020-11-11 14:44:07,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:44:07,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:44:07,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:44:07,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:44:07,367 INFO L87 Difference]: Start difference. First operand 3818 states and 10096 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:08,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:44:08,427 INFO L93 Difference]: Finished difference Result 6269 states and 15464 transitions. [2020-11-11 14:44:08,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 14:44:08,428 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:44:08,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:44:08,435 INFO L225 Difference]: With dead ends: 6269 [2020-11-11 14:44:08,436 INFO L226 Difference]: Without dead ends: 5877 [2020-11-11 14:44:08,436 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=494, Invalid=1576, Unknown=0, NotChecked=0, Total=2070 [2020-11-11 14:44:08,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5877 states. [2020-11-11 14:44:08,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5877 to 3843. [2020-11-11 14:44:08,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3843 states, 3842 states have (on average 2.642113482561166) internal successors, (10151), 3842 states have internal predecessors, (10151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:08,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3843 states to 3843 states and 10151 transitions. [2020-11-11 14:44:08,498 INFO L78 Accepts]: Start accepts. Automaton has 3843 states and 10151 transitions. Word has length 58 [2020-11-11 14:44:08,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:44:08,498 INFO L481 AbstractCegarLoop]: Abstraction has 3843 states and 10151 transitions. [2020-11-11 14:44:08,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:08,498 INFO L276 IsEmpty]: Start isEmpty. Operand 3843 states and 10151 transitions. [2020-11-11 14:44:08,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:44:08,501 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:44:08,501 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:44:08,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-11-11 14:44:08,702 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:44:08,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:44:08,703 INFO L82 PathProgramCache]: Analyzing trace with hash -788853973, now seen corresponding path program 41 times [2020-11-11 14:44:08,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:44:08,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994103738] [2020-11-11 14:44:08,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:44:08,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:44:08,861 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:08,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994103738] [2020-11-11 14:44:08,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932174812] [2020-11-11 14:44:08,862 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:44:08,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-11 14:44:08,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:44:08,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:44:08,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:44:09,139 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:09,142 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:09,144 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:09,190 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:09,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:44:09,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:44:09,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963983755] [2020-11-11 14:44:09,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:44:09,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:44:09,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:44:09,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:44:09,191 INFO L87 Difference]: Start difference. First operand 3843 states and 10151 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:10,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:44:10,078 INFO L93 Difference]: Finished difference Result 5924 states and 14641 transitions. [2020-11-11 14:44:10,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 14:44:10,079 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:44:10,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:44:10,085 INFO L225 Difference]: With dead ends: 5924 [2020-11-11 14:44:10,085 INFO L226 Difference]: Without dead ends: 5772 [2020-11-11 14:44:10,085 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=383, Invalid=1177, Unknown=0, NotChecked=0, Total=1560 [2020-11-11 14:44:10,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5772 states. [2020-11-11 14:44:10,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5772 to 3793. [2020-11-11 14:44:10,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3793 states, 3792 states have (on average 2.6479430379746836) internal successors, (10041), 3792 states have internal predecessors, (10041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:10,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3793 states to 3793 states and 10041 transitions. [2020-11-11 14:44:10,144 INFO L78 Accepts]: Start accepts. Automaton has 3793 states and 10041 transitions. Word has length 58 [2020-11-11 14:44:10,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:44:10,145 INFO L481 AbstractCegarLoop]: Abstraction has 3793 states and 10041 transitions. [2020-11-11 14:44:10,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:10,145 INFO L276 IsEmpty]: Start isEmpty. Operand 3793 states and 10041 transitions. [2020-11-11 14:44:10,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:44:10,148 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:44:10,148 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:44:10,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-11-11 14:44:10,349 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:44:10,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:44:10,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1338466769, now seen corresponding path program 42 times [2020-11-11 14:44:10,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:44:10,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386541686] [2020-11-11 14:44:10,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:44:10,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:44:10,510 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:10,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386541686] [2020-11-11 14:44:10,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669545683] [2020-11-11 14:44:10,511 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:44:10,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-11 14:44:10,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:44:10,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:44:10,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:44:10,766 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:10,771 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:10,775 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:10,828 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:10,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:44:10,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:44:10,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931257799] [2020-11-11 14:44:10,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:44:10,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:44:10,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:44:10,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:44:10,830 INFO L87 Difference]: Start difference. First operand 3793 states and 10041 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:11,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:44:11,392 INFO L93 Difference]: Finished difference Result 5758 states and 14327 transitions. [2020-11-11 14:44:11,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 14:44:11,393 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:44:11,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:44:11,400 INFO L225 Difference]: With dead ends: 5758 [2020-11-11 14:44:11,400 INFO L226 Difference]: Without dead ends: 5606 [2020-11-11 14:44:11,400 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=281, Invalid=775, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 14:44:11,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5606 states. [2020-11-11 14:44:11,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5606 to 3818. [2020-11-11 14:44:11,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3818 states, 3817 states have (on average 2.6450091695048465) internal successors, (10096), 3817 states have internal predecessors, (10096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:11,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3818 states to 3818 states and 10096 transitions. [2020-11-11 14:44:11,462 INFO L78 Accepts]: Start accepts. Automaton has 3818 states and 10096 transitions. Word has length 58 [2020-11-11 14:44:11,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:44:11,462 INFO L481 AbstractCegarLoop]: Abstraction has 3818 states and 10096 transitions. [2020-11-11 14:44:11,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:11,463 INFO L276 IsEmpty]: Start isEmpty. Operand 3818 states and 10096 transitions. [2020-11-11 14:44:11,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:44:11,466 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:44:11,466 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:44:11,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-11-11 14:44:11,667 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:44:11,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:44:11,667 INFO L82 PathProgramCache]: Analyzing trace with hash -271800857, now seen corresponding path program 43 times [2020-11-11 14:44:11,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:44:11,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118498513] [2020-11-11 14:44:11,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:44:11,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:44:11,825 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:11,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118498513] [2020-11-11 14:44:11,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002507449] [2020-11-11 14:44:11,825 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:44:11,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:44:11,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:44:11,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:44:12,135 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:12,138 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:12,139 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:12,189 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:12,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:44:12,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:44:12,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964542254] [2020-11-11 14:44:12,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:44:12,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:44:12,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:44:12,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:44:12,190 INFO L87 Difference]: Start difference. First operand 3818 states and 10096 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:12,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:44:12,960 INFO L93 Difference]: Finished difference Result 6063 states and 14934 transitions. [2020-11-11 14:44:12,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-11 14:44:12,961 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:44:12,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:44:12,968 INFO L225 Difference]: With dead ends: 6063 [2020-11-11 14:44:12,968 INFO L226 Difference]: Without dead ends: 5911 [2020-11-11 14:44:12,968 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=349, Invalid=983, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 14:44:12,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5911 states. [2020-11-11 14:44:13,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5911 to 3818. [2020-11-11 14:44:13,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3818 states, 3817 states have (on average 2.6450091695048465) internal successors, (10096), 3817 states have internal predecessors, (10096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:13,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3818 states to 3818 states and 10096 transitions. [2020-11-11 14:44:13,030 INFO L78 Accepts]: Start accepts. Automaton has 3818 states and 10096 transitions. Word has length 58 [2020-11-11 14:44:13,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:44:13,030 INFO L481 AbstractCegarLoop]: Abstraction has 3818 states and 10096 transitions. [2020-11-11 14:44:13,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:13,030 INFO L276 IsEmpty]: Start isEmpty. Operand 3818 states and 10096 transitions. [2020-11-11 14:44:13,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:44:13,033 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:44:13,033 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:44:13,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:44:13,234 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:44:13,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:44:13,235 INFO L82 PathProgramCache]: Analyzing trace with hash -454507157, now seen corresponding path program 44 times [2020-11-11 14:44:13,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:44:13,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111484218] [2020-11-11 14:44:13,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:44:13,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:44:13,397 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:13,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111484218] [2020-11-11 14:44:13,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104094742] [2020-11-11 14:44:13,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:44:13,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 14:44:13,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:44:13,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:44:13,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:44:13,663 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:13,666 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:13,667 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:13,718 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:13,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:44:13,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:44:13,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833423384] [2020-11-11 14:44:13,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:44:13,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:44:13,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:44:13,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:44:13,721 INFO L87 Difference]: Start difference. First operand 3818 states and 10096 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:14,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:44:14,316 INFO L93 Difference]: Finished difference Result 5773 states and 14367 transitions. [2020-11-11 14:44:14,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 14:44:14,317 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:44:14,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:44:14,326 INFO L225 Difference]: With dead ends: 5773 [2020-11-11 14:44:14,326 INFO L226 Difference]: Without dead ends: 5621 [2020-11-11 14:44:14,326 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=296, Invalid=826, Unknown=0, NotChecked=0, Total=1122 [2020-11-11 14:44:14,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5621 states. [2020-11-11 14:44:14,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5621 to 3793. [2020-11-11 14:44:14,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3793 states, 3792 states have (on average 2.6479430379746836) internal successors, (10041), 3792 states have internal predecessors, (10041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:14,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3793 states to 3793 states and 10041 transitions. [2020-11-11 14:44:14,408 INFO L78 Accepts]: Start accepts. Automaton has 3793 states and 10041 transitions. Word has length 58 [2020-11-11 14:44:14,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:44:14,408 INFO L481 AbstractCegarLoop]: Abstraction has 3793 states and 10041 transitions. [2020-11-11 14:44:14,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:14,408 INFO L276 IsEmpty]: Start isEmpty. Operand 3793 states and 10041 transitions. [2020-11-11 14:44:14,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:44:14,412 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:44:14,412 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:44:14,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:44:14,613 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:44:14,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:44:14,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1855772623, now seen corresponding path program 45 times [2020-11-11 14:44:14,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:44:14,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035515274] [2020-11-11 14:44:14,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:44:14,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:44:14,768 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:14,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035515274] [2020-11-11 14:44:14,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281510518] [2020-11-11 14:44:14,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:44:14,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-11 14:44:14,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:44:14,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:44:14,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:44:15,046 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:15,050 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:15,051 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:15,105 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:15,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:44:15,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:44:15,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164285189] [2020-11-11 14:44:15,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:44:15,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:44:15,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:44:15,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:44:15,106 INFO L87 Difference]: Start difference. First operand 3793 states and 10041 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:15,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:44:15,726 INFO L93 Difference]: Finished difference Result 6047 states and 15125 transitions. [2020-11-11 14:44:15,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 14:44:15,727 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:44:15,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:44:15,734 INFO L225 Difference]: With dead ends: 6047 [2020-11-11 14:44:15,734 INFO L226 Difference]: Without dead ends: 5895 [2020-11-11 14:44:15,734 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=307, Invalid=953, Unknown=0, NotChecked=0, Total=1260 [2020-11-11 14:44:15,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5895 states. [2020-11-11 14:44:15,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5895 to 3843. [2020-11-11 14:44:15,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3843 states, 3842 states have (on average 2.657730348776679) internal successors, (10211), 3842 states have internal predecessors, (10211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:15,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3843 states to 3843 states and 10211 transitions. [2020-11-11 14:44:15,798 INFO L78 Accepts]: Start accepts. Automaton has 3843 states and 10211 transitions. Word has length 58 [2020-11-11 14:44:15,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:44:15,798 INFO L481 AbstractCegarLoop]: Abstraction has 3843 states and 10211 transitions. [2020-11-11 14:44:15,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:15,799 INFO L276 IsEmpty]: Start isEmpty. Operand 3843 states and 10211 transitions. [2020-11-11 14:44:15,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:44:15,802 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:44:15,803 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:44:16,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:44:16,003 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:44:16,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:44:16,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1178190367, now seen corresponding path program 46 times [2020-11-11 14:44:16,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:44:16,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921619777] [2020-11-11 14:44:16,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:44:16,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:44:16,160 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:16,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921619777] [2020-11-11 14:44:16,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556168784] [2020-11-11 14:44:16,161 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:44:16,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 14:44:16,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:44:16,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 14:44:16,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:44:16,393 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 14:44:19,345 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 27 [2020-11-11 14:44:19,356 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:19,362 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 14:44:19,379 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:19,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:44:19,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:44:19,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476986225] [2020-11-11 14:44:19,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:44:19,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:44:19,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:44:19,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=311, Unknown=1, NotChecked=0, Total=420 [2020-11-11 14:44:19,382 INFO L87 Difference]: Start difference. First operand 3843 states and 10211 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:21,771 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 39 [2020-11-11 14:44:23,856 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 37 [2020-11-11 14:44:51,529 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-11-11 14:46:03,165 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 23 [2020-11-11 14:46:10,601 WARN L193 SmtUtils]: Spent 2.22 s on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2020-11-11 14:46:37,861 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 41 [2020-11-11 14:47:23,449 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-11-11 14:48:23,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:48:23,545 INFO L93 Difference]: Finished difference Result 8694 states and 22005 transitions. [2020-11-11 14:48:23,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-11 14:48:23,546 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:48:23,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:48:23,555 INFO L225 Difference]: With dead ends: 8694 [2020-11-11 14:48:23,555 INFO L226 Difference]: Without dead ends: 8154 [2020-11-11 14:48:23,556 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 56.2s TimeCoverageRelationStatistics Valid=595, Invalid=2036, Unknown=21, NotChecked=0, Total=2652 [2020-11-11 14:48:23,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8154 states. [2020-11-11 14:48:23,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8154 to 3925. [2020-11-11 14:48:23,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3925 states, 3924 states have (on average 2.6788990825688073) internal successors, (10512), 3924 states have internal predecessors, (10512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:48:23,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3925 states to 3925 states and 10512 transitions. [2020-11-11 14:48:23,638 INFO L78 Accepts]: Start accepts. Automaton has 3925 states and 10512 transitions. Word has length 58 [2020-11-11 14:48:23,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:48:23,639 INFO L481 AbstractCegarLoop]: Abstraction has 3925 states and 10512 transitions. [2020-11-11 14:48:23,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:48:23,639 INFO L276 IsEmpty]: Start isEmpty. Operand 3925 states and 10512 transitions. [2020-11-11 14:48:23,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:48:23,643 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:48:23,643 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:48:23,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:48:23,844 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:48:23,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:48:23,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1922075013, now seen corresponding path program 47 times [2020-11-11 14:48:23,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:48:23,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808456927] [2020-11-11 14:48:23,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:48:23,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:48:24,018 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:48:24,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808456927] [2020-11-11 14:48:24,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154425858] [2020-11-11 14:48:24,018 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:48:24,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-11 14:48:24,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:48:24,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:48:24,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:48:24,433 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:48:24,435 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:48:24,437 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:48:24,490 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:48:24,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:48:24,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:48:24,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053553322] [2020-11-11 14:48:24,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:48:24,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:48:24,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:48:24,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:48:24,491 INFO L87 Difference]: Start difference. First operand 3925 states and 10512 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:48:25,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:48:25,689 INFO L93 Difference]: Finished difference Result 7223 states and 17992 transitions. [2020-11-11 14:48:25,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 14:48:25,690 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:48:25,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:48:25,699 INFO L225 Difference]: With dead ends: 7223 [2020-11-11 14:48:25,699 INFO L226 Difference]: Without dead ends: 7071 [2020-11-11 14:48:25,700 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=422, Invalid=1300, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 14:48:25,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7071 states. [2020-11-11 14:48:25,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7071 to 4075. [2020-11-11 14:48:25,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4075 states, 4074 states have (on average 2.7054491899852726) internal successors, (11022), 4074 states have internal predecessors, (11022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:48:25,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4075 states to 4075 states and 11022 transitions. [2020-11-11 14:48:25,776 INFO L78 Accepts]: Start accepts. Automaton has 4075 states and 11022 transitions. Word has length 58 [2020-11-11 14:48:25,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:48:25,776 INFO L481 AbstractCegarLoop]: Abstraction has 4075 states and 11022 transitions. [2020-11-11 14:48:25,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:48:25,776 INFO L276 IsEmpty]: Start isEmpty. Operand 4075 states and 11022 transitions. [2020-11-11 14:48:25,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:48:25,781 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:48:25,781 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:48:25,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-11-11 14:48:25,982 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:48:25,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:48:25,982 INFO L82 PathProgramCache]: Analyzing trace with hash -537285371, now seen corresponding path program 48 times [2020-11-11 14:48:25,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:48:25,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148289782] [2020-11-11 14:48:25,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:48:25,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:48:26,149 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:48:26,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148289782] [2020-11-11 14:48:26,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340472464] [2020-11-11 14:48:26,150 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:48:26,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-11 14:48:26,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:48:26,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:48:26,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:48:26,547 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:48:26,550 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:48:26,551 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:48:26,602 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:48:26,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:48:26,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:48:26,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83955423] [2020-11-11 14:48:26,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:48:26,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:48:26,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:48:26,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:48:26,604 INFO L87 Difference]: Start difference. First operand 4075 states and 11022 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:48:27,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:48:27,894 INFO L93 Difference]: Finished difference Result 7288 states and 18587 transitions. [2020-11-11 14:48:27,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 14:48:27,895 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:48:27,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:48:27,907 INFO L225 Difference]: With dead ends: 7288 [2020-11-11 14:48:27,908 INFO L226 Difference]: Without dead ends: 7136 [2020-11-11 14:48:27,908 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=445, Invalid=1361, Unknown=0, NotChecked=0, Total=1806 [2020-11-11 14:48:27,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7136 states. [2020-11-11 14:48:28,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7136 to 4215. [2020-11-11 14:48:28,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4215 states, 4214 states have (on average 2.712861888941623) internal successors, (11432), 4214 states have internal predecessors, (11432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:48:28,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4215 states to 4215 states and 11432 transitions. [2020-11-11 14:48:28,062 INFO L78 Accepts]: Start accepts. Automaton has 4215 states and 11432 transitions. Word has length 58 [2020-11-11 14:48:28,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:48:28,062 INFO L481 AbstractCegarLoop]: Abstraction has 4215 states and 11432 transitions. [2020-11-11 14:48:28,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:48:28,063 INFO L276 IsEmpty]: Start isEmpty. Operand 4215 states and 11432 transitions. [2020-11-11 14:48:28,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:48:28,069 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:48:28,069 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:48:28,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:48:28,285 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:48:28,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:48:28,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1495465783, now seen corresponding path program 49 times [2020-11-11 14:48:28,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:48:28,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318471672] [2020-11-11 14:48:28,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:48:28,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:48:28,462 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:48:28,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318471672] [2020-11-11 14:48:28,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666706893] [2020-11-11 14:48:28,463 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:48:28,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:48:28,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:48:28,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:48:28,817 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 14:48:28,900 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:48:28,910 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:48:28,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:48:28,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-11 14:48:28,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983246137] [2020-11-11 14:48:28,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 14:48:28,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:48:28,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 14:48:28,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2020-11-11 14:48:28,911 INFO L87 Difference]: Start difference. First operand 4215 states and 11432 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:48:30,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:48:30,961 INFO L93 Difference]: Finished difference Result 8654 states and 22345 transitions. [2020-11-11 14:48:30,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-11 14:48:30,963 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:48:30,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:48:30,974 INFO L225 Difference]: With dead ends: 8654 [2020-11-11 14:48:30,974 INFO L226 Difference]: Without dead ends: 8290 [2020-11-11 14:48:30,975 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=693, Invalid=2169, Unknown=0, NotChecked=0, Total=2862 [2020-11-11 14:48:30,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8290 states. [2020-11-11 14:48:31,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8290 to 3975. [2020-11-11 14:48:31,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3975 states, 3974 states have (on average 2.6879718168092603) internal successors, (10682), 3974 states have internal predecessors, (10682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:48:31,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3975 states to 3975 states and 10682 transitions. [2020-11-11 14:48:31,060 INFO L78 Accepts]: Start accepts. Automaton has 3975 states and 10682 transitions. Word has length 58 [2020-11-11 14:48:31,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:48:31,060 INFO L481 AbstractCegarLoop]: Abstraction has 3975 states and 10682 transitions. [2020-11-11 14:48:31,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:48:31,060 INFO L276 IsEmpty]: Start isEmpty. Operand 3975 states and 10682 transitions. [2020-11-11 14:48:31,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:48:31,064 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:48:31,064 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:48:31,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-11-11 14:48:31,265 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:48:31,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:48:31,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1565216441, now seen corresponding path program 50 times [2020-11-11 14:48:31,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:48:31,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624510475] [2020-11-11 14:48:31,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:48:31,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:48:31,445 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:48:31,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624510475] [2020-11-11 14:48:31,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743624756] [2020-11-11 14:48:31,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:48:31,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 14:48:31,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:48:31,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:48:31,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:48:31,800 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:48:31,834 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:48:31,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:48:31,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:48:31,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132668458] [2020-11-11 14:48:31,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:48:31,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:48:31,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:48:31,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:48:31,836 INFO L87 Difference]: Start difference. First operand 3975 states and 10682 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:48:33,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:48:33,157 INFO L93 Difference]: Finished difference Result 7204 states and 17824 transitions. [2020-11-11 14:48:33,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-11 14:48:33,158 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:48:33,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:48:33,167 INFO L225 Difference]: With dead ends: 7204 [2020-11-11 14:48:33,167 INFO L226 Difference]: Without dead ends: 7052 [2020-11-11 14:48:33,168 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=479, Invalid=1591, Unknown=0, NotChecked=0, Total=2070 [2020-11-11 14:48:33,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7052 states. [2020-11-11 14:48:33,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7052 to 4150. [2020-11-11 14:48:33,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4150 states, 4149 states have (on average 2.710773680404917) internal successors, (11247), 4149 states have internal predecessors, (11247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:48:33,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4150 states to 4150 states and 11247 transitions. [2020-11-11 14:48:33,244 INFO L78 Accepts]: Start accepts. Automaton has 4150 states and 11247 transitions. Word has length 58 [2020-11-11 14:48:33,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:48:33,245 INFO L481 AbstractCegarLoop]: Abstraction has 4150 states and 11247 transitions. [2020-11-11 14:48:33,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:48:33,245 INFO L276 IsEmpty]: Start isEmpty. Operand 4150 states and 11247 transitions. [2020-11-11 14:48:33,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:48:33,249 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:48:33,249 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:48:33,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:48:33,452 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:48:33,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:48:33,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1294294571, now seen corresponding path program 51 times [2020-11-11 14:48:33,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:48:33,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904891026] [2020-11-11 14:48:33,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:48:33,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:48:33,648 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:48:33,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904891026] [2020-11-11 14:48:33,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657629392] [2020-11-11 14:48:33,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:48:33,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-11 14:48:33,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:48:33,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:48:33,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:48:33,991 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:48:34,026 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:48:34,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:48:34,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:48:34,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246708058] [2020-11-11 14:48:34,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:48:34,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:48:34,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:48:34,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:48:34,028 INFO L87 Difference]: Start difference. First operand 4150 states and 11247 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:48:35,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:48:35,632 INFO L93 Difference]: Finished difference Result 7727 states and 19013 transitions. [2020-11-11 14:48:35,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-11 14:48:35,633 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:48:35,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:48:35,644 INFO L225 Difference]: With dead ends: 7727 [2020-11-11 14:48:35,644 INFO L226 Difference]: Without dead ends: 7335 [2020-11-11 14:48:35,645 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=560, Invalid=1990, Unknown=0, NotChecked=0, Total=2550 [2020-11-11 14:48:35,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7335 states. [2020-11-11 14:48:35,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7335 to 4185. [2020-11-11 14:48:35,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4185 states, 4184 states have (on average 2.713193116634799) internal successors, (11352), 4184 states have internal predecessors, (11352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:48:35,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4185 states to 4185 states and 11352 transitions. [2020-11-11 14:48:35,728 INFO L78 Accepts]: Start accepts. Automaton has 4185 states and 11352 transitions. Word has length 58 [2020-11-11 14:48:35,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:48:35,728 INFO L481 AbstractCegarLoop]: Abstraction has 4185 states and 11352 transitions. [2020-11-11 14:48:35,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:48:35,728 INFO L276 IsEmpty]: Start isEmpty. Operand 4185 states and 11352 transitions. [2020-11-11 14:48:35,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:48:35,732 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:48:35,732 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:48:35,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-11-11 14:48:35,933 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:48:35,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:48:35,934 INFO L82 PathProgramCache]: Analyzing trace with hash 573546095, now seen corresponding path program 52 times [2020-11-11 14:48:35,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:48:35,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640428589] [2020-11-11 14:48:35,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:48:35,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:48:36,107 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:48:36,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640428589] [2020-11-11 14:48:36,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330390482] [2020-11-11 14:48:36,108 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:48:36,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 14:48:36,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:48:36,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 14:48:36,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:48:36,417 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:48:36,456 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:48:36,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:48:36,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:48:36,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699721243] [2020-11-11 14:48:36,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:48:36,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:48:36,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:48:36,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:48:36,458 INFO L87 Difference]: Start difference. First operand 4185 states and 11352 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:48:37,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:48:37,985 INFO L93 Difference]: Finished difference Result 7434 states and 18656 transitions. [2020-11-11 14:48:37,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-11 14:48:37,986 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:48:37,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:48:37,995 INFO L225 Difference]: With dead ends: 7434 [2020-11-11 14:48:37,996 INFO L226 Difference]: Without dead ends: 7282 [2020-11-11 14:48:37,996 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=565, Invalid=1787, Unknown=0, NotChecked=0, Total=2352 [2020-11-11 14:48:38,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7282 states. [2020-11-11 14:48:38,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7282 to 4285. [2020-11-11 14:48:38,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4285 states, 4284 states have (on average 2.7292250233426705) internal successors, (11692), 4284 states have internal predecessors, (11692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:48:38,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4285 states to 4285 states and 11692 transitions. [2020-11-11 14:48:38,076 INFO L78 Accepts]: Start accepts. Automaton has 4285 states and 11692 transitions. Word has length 58 [2020-11-11 14:48:38,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:48:38,076 INFO L481 AbstractCegarLoop]: Abstraction has 4285 states and 11692 transitions. [2020-11-11 14:48:38,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:48:38,076 INFO L276 IsEmpty]: Start isEmpty. Operand 4285 states and 11692 transitions. [2020-11-11 14:48:38,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:48:38,080 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:48:38,080 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:48:38,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:48:38,281 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:48:38,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:48:38,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1958335737, now seen corresponding path program 53 times [2020-11-11 14:48:38,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:48:38,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071758258] [2020-11-11 14:48:38,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:48:38,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:48:38,475 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:48:38,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071758258] [2020-11-11 14:48:38,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691389142] [2020-11-11 14:48:38,476 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:48:38,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 14:48:38,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:48:38,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:48:38,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:48:38,783 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:48:38,823 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:48:38,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:48:38,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:48:38,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178796848] [2020-11-11 14:48:38,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:48:38,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:48:38,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:48:38,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:48:38,825 INFO L87 Difference]: Start difference. First operand 4285 states and 11692 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:48:40,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:48:40,227 INFO L93 Difference]: Finished difference Result 7692 states and 19732 transitions. [2020-11-11 14:48:40,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-11 14:48:40,228 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:48:40,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:48:40,239 INFO L225 Difference]: With dead ends: 7692 [2020-11-11 14:48:40,239 INFO L226 Difference]: Without dead ends: 7540 [2020-11-11 14:48:40,240 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=538, Invalid=1718, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 14:48:40,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7540 states. [2020-11-11 14:48:40,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7540 to 4415. [2020-11-11 14:48:40,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4415 states, 4414 states have (on average 2.743996375169914) internal successors, (12112), 4414 states have internal predecessors, (12112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:48:40,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4415 states to 4415 states and 12112 transitions. [2020-11-11 14:48:40,328 INFO L78 Accepts]: Start accepts. Automaton has 4415 states and 12112 transitions. Word has length 58 [2020-11-11 14:48:40,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:48:40,328 INFO L481 AbstractCegarLoop]: Abstraction has 4415 states and 12112 transitions. [2020-11-11 14:48:40,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:48:40,328 INFO L276 IsEmpty]: Start isEmpty. Operand 4415 states and 12112 transitions. [2020-11-11 14:48:40,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:48:40,333 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:48:40,333 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:48:40,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:48:40,534 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:48:40,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:48:40,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1000155325, now seen corresponding path program 54 times [2020-11-11 14:48:40,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:48:40,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939647354] [2020-11-11 14:48:40,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:48:40,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:48:40,730 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:48:40,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939647354] [2020-11-11 14:48:40,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221283849] [2020-11-11 14:48:40,730 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:48:40,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 14:48:40,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:48:40,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:48:40,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:48:41,035 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 14:48:41,093 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:48:41,101 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:48:41,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:48:41,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-11 14:48:41,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865809872] [2020-11-11 14:48:41,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 14:48:41,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:48:41,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 14:48:41,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-11-11 14:48:41,103 INFO L87 Difference]: Start difference. First operand 4415 states and 12112 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:48:43,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:48:43,346 INFO L93 Difference]: Finished difference Result 9373 states and 24333 transitions. [2020-11-11 14:48:43,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-11 14:48:43,346 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:48:43,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:48:43,358 INFO L225 Difference]: With dead ends: 9373 [2020-11-11 14:48:43,358 INFO L226 Difference]: Without dead ends: 8839 [2020-11-11 14:48:43,359 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=819, Invalid=2841, Unknown=0, NotChecked=0, Total=3660 [2020-11-11 14:48:43,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8839 states. [2020-11-11 14:48:43,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8839 to 4233. [2020-11-11 14:48:43,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4233 states, 4232 states have (on average 2.7199905482041586) internal successors, (11511), 4232 states have internal predecessors, (11511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:48:43,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4233 states to 4233 states and 11511 transitions. [2020-11-11 14:48:43,450 INFO L78 Accepts]: Start accepts. Automaton has 4233 states and 11511 transitions. Word has length 58 [2020-11-11 14:48:43,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:48:43,450 INFO L481 AbstractCegarLoop]: Abstraction has 4233 states and 11511 transitions. [2020-11-11 14:48:43,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:48:43,450 INFO L276 IsEmpty]: Start isEmpty. Operand 4233 states and 11511 transitions. [2020-11-11 14:48:43,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:48:43,454 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:48:43,454 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:48:43,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2020-11-11 14:48:43,655 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:48:43,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:48:43,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1175613017, now seen corresponding path program 55 times [2020-11-11 14:48:43,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:48:43,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464199407] [2020-11-11 14:48:43,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:48:43,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:48:43,863 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:48:43,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464199407] [2020-11-11 14:48:43,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326027919] [2020-11-11 14:48:43,864 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:48:43,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:48:43,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:48:43,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:48:44,270 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:48:44,346 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:48:44,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:48:44,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:48:44,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420946844] [2020-11-11 14:48:44,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:48:44,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:48:44,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:48:44,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:48:44,349 INFO L87 Difference]: Start difference. First operand 4233 states and 11511 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:48:46,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:48:46,232 INFO L93 Difference]: Finished difference Result 8280 states and 20731 transitions. [2020-11-11 14:48:46,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-11 14:48:46,233 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:48:46,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:48:46,244 INFO L225 Difference]: With dead ends: 8280 [2020-11-11 14:48:46,245 INFO L226 Difference]: Without dead ends: 7888 [2020-11-11 14:48:46,245 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=687, Invalid=2393, Unknown=0, NotChecked=0, Total=3080 [2020-11-11 14:48:46,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7888 states. [2020-11-11 14:48:46,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7888 to 4345. [2020-11-11 14:48:46,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4345 states, 4344 states have (on average 2.74585635359116) internal successors, (11928), 4344 states have internal predecessors, (11928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:48:46,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4345 states to 4345 states and 11928 transitions. [2020-11-11 14:48:46,338 INFO L78 Accepts]: Start accepts. Automaton has 4345 states and 11928 transitions. Word has length 58 [2020-11-11 14:48:46,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:48:46,339 INFO L481 AbstractCegarLoop]: Abstraction has 4345 states and 11928 transitions. [2020-11-11 14:48:46,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:48:46,339 INFO L276 IsEmpty]: Start isEmpty. Operand 4345 states and 11928 transitions. [2020-11-11 14:48:46,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:48:46,345 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:48:46,345 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:48:46,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:48:46,547 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:48:46,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:48:46,547 INFO L82 PathProgramCache]: Analyzing trace with hash -2145274937, now seen corresponding path program 56 times [2020-11-11 14:48:46,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:48:46,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408249153] [2020-11-11 14:48:46,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:48:46,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:48:46,746 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:48:46,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408249153] [2020-11-11 14:48:46,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292787873] [2020-11-11 14:48:46,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:48:46,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 14:48:46,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:48:46,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:48:46,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:48:47,114 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:48:47,153 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:48:47,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:48:47,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:48:47,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821301983] [2020-11-11 14:48:47,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:48:47,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:48:47,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:48:47,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:48:47,155 INFO L87 Difference]: Start difference. First operand 4345 states and 11928 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:48:49,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:48:49,081 INFO L93 Difference]: Finished difference Result 7933 states and 20495 transitions. [2020-11-11 14:48:49,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-11 14:48:49,082 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:48:49,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:48:49,095 INFO L225 Difference]: With dead ends: 7933 [2020-11-11 14:48:49,095 INFO L226 Difference]: Without dead ends: 7541 [2020-11-11 14:48:49,096 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=656, Invalid=2314, Unknown=0, NotChecked=0, Total=2970 [2020-11-11 14:48:49,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7541 states. [2020-11-11 14:48:49,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7541 to 4475. [2020-11-11 14:48:49,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4475 states, 4474 states have (on average 2.756370138578453) internal successors, (12332), 4474 states have internal predecessors, (12332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:48:49,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4475 states to 4475 states and 12332 transitions. [2020-11-11 14:48:49,195 INFO L78 Accepts]: Start accepts. Automaton has 4475 states and 12332 transitions. Word has length 58 [2020-11-11 14:48:49,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:48:49,196 INFO L481 AbstractCegarLoop]: Abstraction has 4475 states and 12332 transitions. [2020-11-11 14:48:49,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:48:49,196 INFO L276 IsEmpty]: Start isEmpty. Operand 4475 states and 12332 transitions. [2020-11-11 14:48:49,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:48:49,201 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:48:49,201 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:48:49,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:48:49,402 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:48:49,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:48:49,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1191511947, now seen corresponding path program 57 times [2020-11-11 14:48:49,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:48:49,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941425376] [2020-11-11 14:48:49,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:48:49,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:48:49,602 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:48:49,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941425376] [2020-11-11 14:48:49,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24279274] [2020-11-11 14:48:49,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:48:49,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-11 14:48:49,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:48:49,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:48:49,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:48:49,895 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 14:48:51,934 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:48:51,943 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:48:51,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:48:51,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:48:51,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048846087] [2020-11-11 14:48:51,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:48:51,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:48:51,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:48:51,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=320, Unknown=1, NotChecked=0, Total=420 [2020-11-11 14:48:51,945 INFO L87 Difference]: Start difference. First operand 4475 states and 12332 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:48:54,390 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 28 [2020-11-11 14:48:58,540 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-11-11 14:49:03,046 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-11-11 14:49:07,165 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 30 [2020-11-11 14:49:13,302 WARN L193 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2020-11-11 14:49:15,382 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 26 [2020-11-11 14:50:16,601 WARN L193 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-11-11 14:51:11,743 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2020-11-11 14:51:26,340 WARN L193 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2020-11-11 14:51:52,927 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2020-11-11 14:52:35,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:52:35,640 INFO L93 Difference]: Finished difference Result 10531 states and 27103 transitions. [2020-11-11 14:52:35,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-11-11 14:52:35,641 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:52:35,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:52:35,662 INFO L225 Difference]: With dead ends: 10531 [2020-11-11 14:52:35,663 INFO L226 Difference]: Without dead ends: 10178 [2020-11-11 14:52:35,663 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1461 ImplicationChecksByTransitivity, 75.8s TimeCoverageRelationStatistics Valid=962, Invalid=3179, Unknown=19, NotChecked=0, Total=4160 [2020-11-11 14:52:35,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10178 states. [2020-11-11 14:52:35,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10178 to 5039. [2020-11-11 14:52:35,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5039 states, 5038 states have (on average 2.7683604605001984) internal successors, (13947), 5038 states have internal predecessors, (13947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:52:35,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5039 states to 5039 states and 13947 transitions. [2020-11-11 14:52:35,852 INFO L78 Accepts]: Start accepts. Automaton has 5039 states and 13947 transitions. Word has length 58 [2020-11-11 14:52:35,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:52:35,853 INFO L481 AbstractCegarLoop]: Abstraction has 5039 states and 13947 transitions. [2020-11-11 14:52:35,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:52:35,853 INFO L276 IsEmpty]: Start isEmpty. Operand 5039 states and 13947 transitions. [2020-11-11 14:52:35,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:52:35,862 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:52:35,863 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:52:36,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-11-11 14:52:36,078 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:52:36,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:52:36,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1648701041, now seen corresponding path program 58 times [2020-11-11 14:52:36,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:52:36,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049720675] [2020-11-11 14:52:36,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:52:36,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:52:36,336 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:52:36,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049720675] [2020-11-11 14:52:36,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859112179] [2020-11-11 14:52:36,336 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:52:36,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 14:52:36,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:52:36,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 14:52:36,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:52:36,723 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:52:36,727 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:52:36,729 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:52:36,796 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:52:36,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:52:36,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:52:36,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135151643] [2020-11-11 14:52:36,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:52:36,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:52:36,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:52:36,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:52:36,797 INFO L87 Difference]: Start difference. First operand 5039 states and 13947 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:52:38,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:52:38,025 INFO L93 Difference]: Finished difference Result 7516 states and 19297 transitions. [2020-11-11 14:52:38,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-11 14:52:38,026 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:52:38,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:52:38,038 INFO L225 Difference]: With dead ends: 7516 [2020-11-11 14:52:38,039 INFO L226 Difference]: Without dead ends: 7364 [2020-11-11 14:52:38,039 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=363, Invalid=1277, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 14:52:38,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7364 states. [2020-11-11 14:52:38,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7364 to 5014. [2020-11-11 14:52:38,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5014 states, 5013 states have (on average 2.7711948932774786) internal successors, (13892), 5013 states have internal predecessors, (13892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:52:38,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5014 states to 5014 states and 13892 transitions. [2020-11-11 14:52:38,136 INFO L78 Accepts]: Start accepts. Automaton has 5014 states and 13892 transitions. Word has length 58 [2020-11-11 14:52:38,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:52:38,136 INFO L481 AbstractCegarLoop]: Abstraction has 5014 states and 13892 transitions. [2020-11-11 14:52:38,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:52:38,136 INFO L276 IsEmpty]: Start isEmpty. Operand 5014 states and 13892 transitions. [2020-11-11 14:52:38,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:52:38,143 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:52:38,143 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:52:38,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:52:38,344 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:52:38,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:52:38,345 INFO L82 PathProgramCache]: Analyzing trace with hash 2038373057, now seen corresponding path program 59 times [2020-11-11 14:52:38,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:52:38,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718914828] [2020-11-11 14:52:38,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:52:38,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:52:38,571 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:52:38,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718914828] [2020-11-11 14:52:38,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060618445] [2020-11-11 14:52:38,572 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:52:38,626 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-11 14:52:38,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:52:38,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:52:38,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:52:38,938 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:52:38,942 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:52:38,943 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:52:39,020 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:52:39,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:52:39,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:52:39,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315967321] [2020-11-11 14:52:39,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:52:39,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:52:39,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:52:39,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:52:39,022 INFO L87 Difference]: Start difference. First operand 5014 states and 13892 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:52:40,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:52:40,775 INFO L93 Difference]: Finished difference Result 8213 states and 21163 transitions. [2020-11-11 14:52:40,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-11 14:52:40,776 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:52:40,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:52:40,787 INFO L225 Difference]: With dead ends: 8213 [2020-11-11 14:52:40,788 INFO L226 Difference]: Without dead ends: 8061 [2020-11-11 14:52:40,788 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=486, Invalid=1676, Unknown=0, NotChecked=0, Total=2162 [2020-11-11 14:52:40,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8061 states. [2020-11-11 14:52:40,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8061 to 5039. [2020-11-11 14:52:40,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5039 states, 5038 states have (on average 2.780269948392219) internal successors, (14007), 5038 states have internal predecessors, (14007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:52:40,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5039 states to 5039 states and 14007 transitions. [2020-11-11 14:52:40,878 INFO L78 Accepts]: Start accepts. Automaton has 5039 states and 14007 transitions. Word has length 58 [2020-11-11 14:52:40,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:52:40,878 INFO L481 AbstractCegarLoop]: Abstraction has 5039 states and 14007 transitions. [2020-11-11 14:52:40,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:52:40,879 INFO L276 IsEmpty]: Start isEmpty. Operand 5039 states and 14007 transitions. [2020-11-11 14:52:40,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:52:40,884 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:52:40,884 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:52:41,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-11-11 14:52:41,085 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:52:41,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:52:41,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1895122259, now seen corresponding path program 60 times [2020-11-11 14:52:41,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:52:41,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528502557] [2020-11-11 14:52:41,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:52:41,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:52:41,318 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:52:41,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528502557] [2020-11-11 14:52:41,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853042000] [2020-11-11 14:52:41,319 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:52:41,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-11 14:52:41,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:52:41,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:52:41,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:52:41,764 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:52:41,766 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:52:41,769 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:52:41,835 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:52:41,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:52:41,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:52:41,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931656908] [2020-11-11 14:52:41,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:52:41,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:52:41,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:52:41,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:52:41,837 INFO L87 Difference]: Start difference. First operand 5039 states and 14007 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:52:43,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:52:43,748 INFO L93 Difference]: Finished difference Result 8450 states and 22265 transitions. [2020-11-11 14:52:43,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-11 14:52:43,750 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:52:43,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:52:43,760 INFO L225 Difference]: With dead ends: 8450 [2020-11-11 14:52:43,760 INFO L226 Difference]: Without dead ends: 8298 [2020-11-11 14:52:43,761 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=548, Invalid=1804, Unknown=0, NotChecked=0, Total=2352 [2020-11-11 14:52:43,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8298 states. [2020-11-11 14:52:43,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8298 to 5179. [2020-11-11 14:52:43,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5179 states, 5178 states have (on average 2.7842796446504443) internal successors, (14417), 5178 states have internal predecessors, (14417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:52:43,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5179 states to 5179 states and 14417 transitions. [2020-11-11 14:52:43,875 INFO L78 Accepts]: Start accepts. Automaton has 5179 states and 14417 transitions. Word has length 58 [2020-11-11 14:52:43,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:52:43,875 INFO L481 AbstractCegarLoop]: Abstraction has 5179 states and 14417 transitions. [2020-11-11 14:52:43,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:52:43,876 INFO L276 IsEmpty]: Start isEmpty. Operand 5179 states and 14417 transitions. [2020-11-11 14:52:43,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:52:43,881 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:52:43,881 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:52:44,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-11-11 14:52:44,082 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:52:44,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:52:44,083 INFO L82 PathProgramCache]: Analyzing trace with hash 936941847, now seen corresponding path program 61 times [2020-11-11 14:52:44,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:52:44,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756980385] [2020-11-11 14:52:44,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:52:44,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:52:44,311 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:52:44,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756980385] [2020-11-11 14:52:44,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714550389] [2020-11-11 14:52:44,312 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:52:44,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:52:44,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:52:44,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:52:44,676 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 14:52:44,763 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:52:44,771 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:52:44,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:52:44,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-11 14:52:44,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695254854] [2020-11-11 14:52:44,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 14:52:44,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:52:44,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 14:52:44,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2020-11-11 14:52:44,772 INFO L87 Difference]: Start difference. First operand 5179 states and 14417 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:52:47,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:52:47,430 INFO L93 Difference]: Finished difference Result 9772 states and 26070 transitions. [2020-11-11 14:52:47,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-11 14:52:47,431 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:52:47,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:52:47,445 INFO L225 Difference]: With dead ends: 9772 [2020-11-11 14:52:47,445 INFO L226 Difference]: Without dead ends: 9331 [2020-11-11 14:52:47,445 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=753, Invalid=2553, Unknown=0, NotChecked=0, Total=3306 [2020-11-11 14:52:47,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9331 states. [2020-11-11 14:52:47,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9331 to 4721. [2020-11-11 14:52:47,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4721 states, 4720 states have (on average 2.765677966101695) internal successors, (13054), 4720 states have internal predecessors, (13054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:52:47,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4721 states to 4721 states and 13054 transitions. [2020-11-11 14:52:47,548 INFO L78 Accepts]: Start accepts. Automaton has 4721 states and 13054 transitions. Word has length 58 [2020-11-11 14:52:47,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:52:47,548 INFO L481 AbstractCegarLoop]: Abstraction has 4721 states and 13054 transitions. [2020-11-11 14:52:47,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:52:47,548 INFO L276 IsEmpty]: Start isEmpty. Operand 4721 states and 13054 transitions. [2020-11-11 14:52:47,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:52:47,553 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:52:47,553 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:52:47,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-11-11 14:52:47,754 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:52:47,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:52:47,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1856535367, now seen corresponding path program 62 times [2020-11-11 14:52:47,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:52:47,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831110825] [2020-11-11 14:52:47,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:52:47,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:52:48,070 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:52:48,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831110825] [2020-11-11 14:52:48,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545100409] [2020-11-11 14:52:48,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:52:48,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 14:52:48,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:52:48,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:52:48,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:52:48,511 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:52:48,554 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:52:48,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:52:48,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:52:48,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252426908] [2020-11-11 14:52:48,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:52:48,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:52:48,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:52:48,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:52:48,556 INFO L87 Difference]: Start difference. First operand 4721 states and 13054 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:52:49,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:52:49,879 INFO L93 Difference]: Finished difference Result 7455 states and 19604 transitions. [2020-11-11 14:52:49,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 14:52:49,881 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:52:49,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:52:49,893 INFO L225 Difference]: With dead ends: 7455 [2020-11-11 14:52:49,893 INFO L226 Difference]: Without dead ends: 7303 [2020-11-11 14:52:49,893 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=405, Invalid=1401, Unknown=0, NotChecked=0, Total=1806 [2020-11-11 14:52:49,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7303 states. [2020-11-11 14:52:49,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7303 to 4831. [2020-11-11 14:52:49,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4831 states, 4830 states have (on average 2.7710144927536233) internal successors, (13384), 4830 states have internal predecessors, (13384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:52:49,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4831 states to 4831 states and 13384 transitions. [2020-11-11 14:52:49,994 INFO L78 Accepts]: Start accepts. Automaton has 4831 states and 13384 transitions. Word has length 58 [2020-11-11 14:52:49,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:52:49,995 INFO L481 AbstractCegarLoop]: Abstraction has 4831 states and 13384 transitions. [2020-11-11 14:52:49,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:52:49,995 INFO L276 IsEmpty]: Start isEmpty. Operand 4831 states and 13384 transitions. [2020-11-11 14:52:50,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:52:50,000 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:52:50,000 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:52:50,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:52:50,201 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:52:50,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:52:50,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1480251517, now seen corresponding path program 63 times [2020-11-11 14:52:50,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:52:50,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258032820] [2020-11-11 14:52:50,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:52:50,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:52:50,471 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:52:50,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258032820] [2020-11-11 14:52:50,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146124567] [2020-11-11 14:52:50,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:52:50,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-11 14:52:50,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:52:50,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:52:50,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:52:50,813 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 14:52:50,882 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:52:50,890 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:52:50,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:52:50,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-11 14:52:50,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101136504] [2020-11-11 14:52:50,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 14:52:50,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:52:50,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 14:52:50,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2020-11-11 14:52:50,891 INFO L87 Difference]: Start difference. First operand 4831 states and 13384 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:52:53,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:52:53,066 INFO L93 Difference]: Finished difference Result 8759 states and 23251 transitions. [2020-11-11 14:52:53,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-11 14:52:53,068 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:52:53,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:52:53,081 INFO L225 Difference]: With dead ends: 8759 [2020-11-11 14:52:53,081 INFO L226 Difference]: Without dead ends: 8395 [2020-11-11 14:52:53,082 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=649, Invalid=2213, Unknown=0, NotChecked=0, Total=2862 [2020-11-11 14:52:53,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8395 states. [2020-11-11 14:52:53,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8395 to 4721. [2020-11-11 14:52:53,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4721 states, 4720 states have (on average 2.765677966101695) internal successors, (13054), 4720 states have internal predecessors, (13054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:52:53,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4721 states to 4721 states and 13054 transitions. [2020-11-11 14:52:53,186 INFO L78 Accepts]: Start accepts. Automaton has 4721 states and 13054 transitions. Word has length 58 [2020-11-11 14:52:53,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:52:53,186 INFO L481 AbstractCegarLoop]: Abstraction has 4721 states and 13054 transitions. [2020-11-11 14:52:53,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:52:53,186 INFO L276 IsEmpty]: Start isEmpty. Operand 4721 states and 13054 transitions. [2020-11-11 14:52:53,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:52:53,191 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:52:53,191 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:52:53,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:52:53,392 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:52:53,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:52:53,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1055059259, now seen corresponding path program 64 times [2020-11-11 14:52:53,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:52:53,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733472107] [2020-11-11 14:52:53,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:52:53,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:52:53,646 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:52:53,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733472107] [2020-11-11 14:52:53,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781607408] [2020-11-11 14:52:53,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:52:53,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 14:52:53,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:52:53,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 14:52:53,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:52:54,096 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:52:54,149 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:52:54,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:52:54,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:52:54,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166039085] [2020-11-11 14:52:54,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:52:54,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:52:54,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:52:54,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:52:54,151 INFO L87 Difference]: Start difference. First operand 4721 states and 13054 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:52:55,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:52:55,872 INFO L93 Difference]: Finished difference Result 7691 states and 19460 transitions. [2020-11-11 14:52:55,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-11 14:52:55,873 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:52:55,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:52:55,886 INFO L225 Difference]: With dead ends: 7691 [2020-11-11 14:52:55,886 INFO L226 Difference]: Without dead ends: 7539 [2020-11-11 14:52:55,886 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=463, Invalid=1607, Unknown=0, NotChecked=0, Total=2070 [2020-11-11 14:52:55,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7539 states. [2020-11-11 14:52:55,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7539 to 4821. [2020-11-11 14:52:55,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4821 states, 4820 states have (on average 2.7601659751037344) internal successors, (13304), 4820 states have internal predecessors, (13304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:52:55,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4821 states to 4821 states and 13304 transitions. [2020-11-11 14:52:55,975 INFO L78 Accepts]: Start accepts. Automaton has 4821 states and 13304 transitions. Word has length 58 [2020-11-11 14:52:55,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:52:55,975 INFO L481 AbstractCegarLoop]: Abstraction has 4821 states and 13304 transitions. [2020-11-11 14:52:55,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:52:55,975 INFO L276 IsEmpty]: Start isEmpty. Operand 4821 states and 13304 transitions. [2020-11-11 14:52:55,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:52:55,980 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:52:55,980 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:52:56,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:52:56,182 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:52:56,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:52:56,183 INFO L82 PathProgramCache]: Analyzing trace with hash 784137389, now seen corresponding path program 65 times [2020-11-11 14:52:56,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:52:56,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608510844] [2020-11-11 14:52:56,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:52:56,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:52:56,436 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:52:56,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608510844] [2020-11-11 14:52:56,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162849756] [2020-11-11 14:52:56,437 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:52:56,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-11 14:52:56,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:52:56,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:52:56,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:52:56,826 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:52:56,835 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:52:56,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:52:56,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:52:56,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302831658] [2020-11-11 14:52:56,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:52:56,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:52:56,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:52:56,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:52:56,837 INFO L87 Difference]: Start difference. First operand 4821 states and 13304 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:52:58,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:52:58,560 INFO L93 Difference]: Finished difference Result 7645 states and 19378 transitions. [2020-11-11 14:52:58,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-11 14:52:58,561 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:52:58,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:52:58,573 INFO L225 Difference]: With dead ends: 7645 [2020-11-11 14:52:58,573 INFO L226 Difference]: Without dead ends: 7493 [2020-11-11 14:52:58,573 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=523, Invalid=1733, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 14:52:58,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7493 states. [2020-11-11 14:52:58,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7493 to 4871. [2020-11-11 14:52:58,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4871 states, 4870 states have (on average 2.7544147843942506) internal successors, (13414), 4870 states have internal predecessors, (13414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:52:58,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4871 states to 4871 states and 13414 transitions. [2020-11-11 14:52:58,666 INFO L78 Accepts]: Start accepts. Automaton has 4871 states and 13414 transitions. Word has length 58 [2020-11-11 14:52:58,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:52:58,666 INFO L481 AbstractCegarLoop]: Abstraction has 4871 states and 13414 transitions. [2020-11-11 14:52:58,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:52:58,666 INFO L276 IsEmpty]: Start isEmpty. Operand 4871 states and 13414 transitions. [2020-11-11 14:52:58,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:52:58,671 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:52:58,671 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:52:58,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:52:58,873 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:52:58,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:52:58,874 INFO L82 PathProgramCache]: Analyzing trace with hash 456334899, now seen corresponding path program 12 times [2020-11-11 14:52:58,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:52:58,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108778737] [2020-11-11 14:52:58,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:52:58,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:52:59,155 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:52:59,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108778737] [2020-11-11 14:52:59,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50902340] [2020-11-11 14:52:59,156 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:52:59,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-11 14:52:59,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:52:59,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:52:59,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:52:59,539 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:52:59,582 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:52:59,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:52:59,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:52:59,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568919053] [2020-11-11 14:52:59,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:52:59,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:52:59,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:52:59,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:52:59,583 INFO L87 Difference]: Start difference. First operand 4871 states and 13414 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:01,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:53:01,158 INFO L93 Difference]: Finished difference Result 7833 states and 19867 transitions. [2020-11-11 14:53:01,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 14:53:01,159 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:53:01,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:53:01,170 INFO L225 Difference]: With dead ends: 7833 [2020-11-11 14:53:01,170 INFO L226 Difference]: Without dead ends: 7441 [2020-11-11 14:53:01,170 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=435, Invalid=1635, Unknown=0, NotChecked=0, Total=2070 [2020-11-11 14:53:01,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7441 states. [2020-11-11 14:53:01,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7441 to 4826. [2020-11-11 14:53:01,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4826 states, 4825 states have (on average 2.7624870466321245) internal successors, (13329), 4825 states have internal predecessors, (13329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:01,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 13329 transitions. [2020-11-11 14:53:01,259 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 13329 transitions. Word has length 58 [2020-11-11 14:53:01,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:53:01,259 INFO L481 AbstractCegarLoop]: Abstraction has 4826 states and 13329 transitions. [2020-11-11 14:53:01,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:01,259 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 13329 transitions. [2020-11-11 14:53:01,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:53:01,264 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:53:01,264 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:53:01,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2020-11-11 14:53:01,464 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:53:01,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:53:01,465 INFO L82 PathProgramCache]: Analyzing trace with hash -303431867, now seen corresponding path program 66 times [2020-11-11 14:53:01,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:53:01,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091662344] [2020-11-11 14:53:01,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:53:01,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:53:01,723 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:53:01,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091662344] [2020-11-11 14:53:01,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266819528] [2020-11-11 14:53:01,723 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:53:01,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-11 14:53:01,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:53:01,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:53:01,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:53:02,112 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:53:02,165 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:53:02,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:53:02,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:53:02,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223856048] [2020-11-11 14:53:02,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:53:02,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:53:02,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:53:02,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:53:02,168 INFO L87 Difference]: Start difference. First operand 4826 states and 13329 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:04,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:53:04,331 INFO L93 Difference]: Finished difference Result 7754 states and 19763 transitions. [2020-11-11 14:53:04,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-11 14:53:04,333 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:53:04,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:53:04,346 INFO L225 Difference]: With dead ends: 7754 [2020-11-11 14:53:04,346 INFO L226 Difference]: Without dead ends: 7602 [2020-11-11 14:53:04,347 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=599, Invalid=2053, Unknown=0, NotChecked=0, Total=2652 [2020-11-11 14:53:04,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7602 states. [2020-11-11 14:53:04,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7602 to 4936. [2020-11-11 14:53:04,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4936 states, 4935 states have (on average 2.7681864235055724) internal successors, (13661), 4935 states have internal predecessors, (13661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:04,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4936 states to 4936 states and 13661 transitions. [2020-11-11 14:53:04,452 INFO L78 Accepts]: Start accepts. Automaton has 4936 states and 13661 transitions. Word has length 58 [2020-11-11 14:53:04,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:53:04,453 INFO L481 AbstractCegarLoop]: Abstraction has 4936 states and 13661 transitions. [2020-11-11 14:53:04,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:04,453 INFO L276 IsEmpty]: Start isEmpty. Operand 4936 states and 13661 transitions. [2020-11-11 14:53:04,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:53:04,459 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:53:04,460 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:53:04,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:53:04,661 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:53:04,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:53:04,661 INFO L82 PathProgramCache]: Analyzing trace with hash -574353737, now seen corresponding path program 67 times [2020-11-11 14:53:04,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:53:04,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130909404] [2020-11-11 14:53:04,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:53:04,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:53:04,996 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:53:04,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130909404] [2020-11-11 14:53:04,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9132879] [2020-11-11 14:53:04,997 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:53:05,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:53:05,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:53:05,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:53:05,526 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:53:05,571 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:53:05,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:53:05,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:53:05,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044225546] [2020-11-11 14:53:05,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:53:05,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:53:05,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:53:05,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:53:05,573 INFO L87 Difference]: Start difference. First operand 4936 states and 13661 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:07,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:53:07,571 INFO L93 Difference]: Finished difference Result 8130 states and 20609 transitions. [2020-11-11 14:53:07,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-11 14:53:07,572 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:53:07,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:53:07,586 INFO L225 Difference]: With dead ends: 8130 [2020-11-11 14:53:07,586 INFO L226 Difference]: Without dead ends: 7978 [2020-11-11 14:53:07,587 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=530, Invalid=1822, Unknown=0, NotChecked=0, Total=2352 [2020-11-11 14:53:07,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7978 states. [2020-11-11 14:53:07,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7978 to 4976. [2020-11-11 14:53:07,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4976 states, 4975 states have (on average 2.778492462311558) internal successors, (13823), 4975 states have internal predecessors, (13823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:07,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4976 states to 4976 states and 13823 transitions. [2020-11-11 14:53:07,699 INFO L78 Accepts]: Start accepts. Automaton has 4976 states and 13823 transitions. Word has length 58 [2020-11-11 14:53:07,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:53:07,699 INFO L481 AbstractCegarLoop]: Abstraction has 4976 states and 13823 transitions. [2020-11-11 14:53:07,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:07,700 INFO L276 IsEmpty]: Start isEmpty. Operand 4976 states and 13823 transitions. [2020-11-11 14:53:07,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:53:07,706 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:53:07,706 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:53:07,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:53:07,907 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:53:07,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:53:07,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1295102213, now seen corresponding path program 68 times [2020-11-11 14:53:07,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:53:07,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383043482] [2020-11-11 14:53:07,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:53:07,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:53:08,161 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:53:08,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383043482] [2020-11-11 14:53:08,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420833447] [2020-11-11 14:53:08,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:53:08,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 14:53:08,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:53:08,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:53:08,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:53:08,590 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:53:08,634 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:53:08,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:53:08,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:53:08,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127696949] [2020-11-11 14:53:08,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:53:08,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:53:08,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:53:08,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:53:08,636 INFO L87 Difference]: Start difference. First operand 4976 states and 13823 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:10,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:53:10,581 INFO L93 Difference]: Finished difference Result 7882 states and 20276 transitions. [2020-11-11 14:53:10,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-11 14:53:10,583 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:53:10,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:53:10,597 INFO L225 Difference]: With dead ends: 7882 [2020-11-11 14:53:10,597 INFO L226 Difference]: Without dead ends: 7730 [2020-11-11 14:53:10,598 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=604, Invalid=2048, Unknown=0, NotChecked=0, Total=2652 [2020-11-11 14:53:10,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7730 states. [2020-11-11 14:53:10,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7730 to 5046. [2020-11-11 14:53:10,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5046 states, 5045 states have (on average 2.7883052527254706) internal successors, (14067), 5045 states have internal predecessors, (14067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:10,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5046 states to 5046 states and 14067 transitions. [2020-11-11 14:53:10,718 INFO L78 Accepts]: Start accepts. Automaton has 5046 states and 14067 transitions. Word has length 58 [2020-11-11 14:53:10,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:53:10,718 INFO L481 AbstractCegarLoop]: Abstraction has 5046 states and 14067 transitions. [2020-11-11 14:53:10,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:10,718 INFO L276 IsEmpty]: Start isEmpty. Operand 5046 states and 14067 transitions. [2020-11-11 14:53:10,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:53:10,724 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:53:10,724 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:53:10,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:53:10,925 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:53:10,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:53:10,926 INFO L82 PathProgramCache]: Analyzing trace with hash 89687429, now seen corresponding path program 69 times [2020-11-11 14:53:10,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:53:10,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896708104] [2020-11-11 14:53:10,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:53:10,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:53:11,225 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:53:11,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896708104] [2020-11-11 14:53:11,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578760601] [2020-11-11 14:53:11,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:53:11,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-11 14:53:11,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:53:11,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:53:11,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:53:11,655 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:53:11,702 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:53:11,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:53:11,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:53:11,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918727386] [2020-11-11 14:53:11,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:53:11,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:53:11,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:53:11,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:53:11,704 INFO L87 Difference]: Start difference. First operand 5046 states and 14067 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:13,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:53:13,761 INFO L93 Difference]: Finished difference Result 8024 states and 21067 transitions. [2020-11-11 14:53:13,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-11 14:53:13,762 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:53:13,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:53:13,774 INFO L225 Difference]: With dead ends: 8024 [2020-11-11 14:53:13,774 INFO L226 Difference]: Without dead ends: 7872 [2020-11-11 14:53:13,775 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=651, Invalid=2105, Unknown=0, NotChecked=0, Total=2756 [2020-11-11 14:53:13,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7872 states. [2020-11-11 14:53:13,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7872 to 5126. [2020-11-11 14:53:13,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5126 states, 5125 states have (on average 2.793560975609756) internal successors, (14317), 5125 states have internal predecessors, (14317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:13,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5126 states to 5126 states and 14317 transitions. [2020-11-11 14:53:13,875 INFO L78 Accepts]: Start accepts. Automaton has 5126 states and 14317 transitions. Word has length 58 [2020-11-11 14:53:13,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:53:13,875 INFO L481 AbstractCegarLoop]: Abstraction has 5126 states and 14317 transitions. [2020-11-11 14:53:13,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:13,875 INFO L276 IsEmpty]: Start isEmpty. Operand 5126 states and 14317 transitions. [2020-11-11 14:53:13,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:53:13,880 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:53:13,880 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:53:14,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:53:14,081 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:53:14,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:53:14,082 INFO L82 PathProgramCache]: Analyzing trace with hash -868492983, now seen corresponding path program 70 times [2020-11-11 14:53:14,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:53:14,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522290173] [2020-11-11 14:53:14,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:53:14,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:53:14,329 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:53:14,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522290173] [2020-11-11 14:53:14,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994087273] [2020-11-11 14:53:14,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:53:14,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 14:53:14,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:53:14,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 14:53:14,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:53:14,741 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 14:53:14,810 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:53:14,820 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:53:14,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:53:14,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-11 14:53:14,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453840667] [2020-11-11 14:53:14,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 14:53:14,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:53:14,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 14:53:14,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-11-11 14:53:14,821 INFO L87 Difference]: Start difference. First operand 5126 states and 14317 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:17,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:53:17,376 INFO L93 Difference]: Finished difference Result 9354 states and 24987 transitions. [2020-11-11 14:53:17,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-11 14:53:17,378 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:53:17,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:53:17,393 INFO L225 Difference]: With dead ends: 9354 [2020-11-11 14:53:17,393 INFO L226 Difference]: Without dead ends: 8942 [2020-11-11 14:53:17,394 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1084 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=780, Invalid=2642, Unknown=0, NotChecked=0, Total=3422 [2020-11-11 14:53:17,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8942 states. [2020-11-11 14:53:17,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8942 to 5019. [2020-11-11 14:53:17,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5019 states, 5018 states have (on average 2.7672379434037464) internal successors, (13886), 5018 states have internal predecessors, (13886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:17,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5019 states to 5019 states and 13886 transitions. [2020-11-11 14:53:17,506 INFO L78 Accepts]: Start accepts. Automaton has 5019 states and 13886 transitions. Word has length 58 [2020-11-11 14:53:17,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:53:17,506 INFO L481 AbstractCegarLoop]: Abstraction has 5019 states and 13886 transitions. [2020-11-11 14:53:17,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:17,507 INFO L276 IsEmpty]: Start isEmpty. Operand 5019 states and 13886 transitions. [2020-11-11 14:53:17,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:53:17,513 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:53:17,513 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:53:17,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-11-11 14:53:17,714 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:53:17,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:53:17,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1250705971, now seen corresponding path program 71 times [2020-11-11 14:53:17,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:53:17,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936674039] [2020-11-11 14:53:17,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:53:17,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:53:17,980 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:53:17,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936674039] [2020-11-11 14:53:17,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109007225] [2020-11-11 14:53:17,981 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:53:18,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-11 14:53:18,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:53:18,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:53:18,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:53:18,440 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:53:18,487 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:53:18,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:53:18,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:53:18,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961112327] [2020-11-11 14:53:18,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:53:18,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:53:18,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:53:18,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:53:18,489 INFO L87 Difference]: Start difference. First operand 5019 states and 13886 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:20,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:53:20,777 INFO L93 Difference]: Finished difference Result 8442 states and 21670 transitions. [2020-11-11 14:53:20,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-11-11 14:53:20,780 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:53:20,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:53:20,791 INFO L225 Difference]: With dead ends: 8442 [2020-11-11 14:53:20,791 INFO L226 Difference]: Without dead ends: 8290 [2020-11-11 14:53:20,791 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=724, Invalid=2468, Unknown=0, NotChecked=0, Total=3192 [2020-11-11 14:53:20,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8290 states. [2020-11-11 14:53:20,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8290 to 5099. [2020-11-11 14:53:20,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5099 states, 5098 states have (on average 2.791486857591212) internal successors, (14231), 5098 states have internal predecessors, (14231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:20,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5099 states to 5099 states and 14231 transitions. [2020-11-11 14:53:20,892 INFO L78 Accepts]: Start accepts. Automaton has 5099 states and 14231 transitions. Word has length 58 [2020-11-11 14:53:20,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:53:20,892 INFO L481 AbstractCegarLoop]: Abstraction has 5099 states and 14231 transitions. [2020-11-11 14:53:20,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:20,892 INFO L276 IsEmpty]: Start isEmpty. Operand 5099 states and 14231 transitions. [2020-11-11 14:53:20,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:53:20,900 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:53:20,900 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:53:21,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-11-11 14:53:21,116 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:53:21,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:53:21,116 INFO L82 PathProgramCache]: Analyzing trace with hash 281044051, now seen corresponding path program 72 times [2020-11-11 14:53:21,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:53:21,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984073317] [2020-11-11 14:53:21,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:53:21,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:53:21,353 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:53:21,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984073317] [2020-11-11 14:53:21,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535721095] [2020-11-11 14:53:21,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:53:21,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-11 14:53:21,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:53:21,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:53:21,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:53:21,732 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:53:21,741 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:53:21,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:53:21,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:53:21,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391385630] [2020-11-11 14:53:21,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:53:21,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:53:21,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:53:21,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:53:21,743 INFO L87 Difference]: Start difference. First operand 5099 states and 14231 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:24,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:53:24,405 INFO L93 Difference]: Finished difference Result 8499 states and 22444 transitions. [2020-11-11 14:53:24,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-11-11 14:53:24,406 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:53:24,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:53:24,419 INFO L225 Difference]: With dead ends: 8499 [2020-11-11 14:53:24,419 INFO L226 Difference]: Without dead ends: 8347 [2020-11-11 14:53:24,419 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1178 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=855, Invalid=2805, Unknown=0, NotChecked=0, Total=3660 [2020-11-11 14:53:24,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8347 states. [2020-11-11 14:53:24,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8347 to 5289. [2020-11-11 14:53:24,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5289 states, 5288 states have (on average 2.800869894099849) internal successors, (14811), 5288 states have internal predecessors, (14811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:24,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5289 states to 5289 states and 14811 transitions. [2020-11-11 14:53:24,534 INFO L78 Accepts]: Start accepts. Automaton has 5289 states and 14811 transitions. Word has length 58 [2020-11-11 14:53:24,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:53:24,534 INFO L481 AbstractCegarLoop]: Abstraction has 5289 states and 14811 transitions. [2020-11-11 14:53:24,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:24,534 INFO L276 IsEmpty]: Start isEmpty. Operand 5289 states and 14811 transitions. [2020-11-11 14:53:24,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:53:24,540 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:53:24,540 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:53:24,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:53:24,741 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:53:24,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:53:24,741 INFO L82 PathProgramCache]: Analyzing trace with hash -677136361, now seen corresponding path program 73 times [2020-11-11 14:53:24,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:53:24,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770303878] [2020-11-11 14:53:24,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:53:24,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:53:25,035 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:53:25,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770303878] [2020-11-11 14:53:25,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817564024] [2020-11-11 14:53:25,035 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:53:25,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:53:25,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:53:25,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:53:25,387 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 14:53:25,408 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:53:25,416 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:53:25,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:53:25,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-11 14:53:25,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545583106] [2020-11-11 14:53:25,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 14:53:25,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:53:25,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 14:53:25,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-11-11 14:53:25,417 INFO L87 Difference]: Start difference. First operand 5289 states and 14811 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:28,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:53:28,562 INFO L93 Difference]: Finished difference Result 9543 states and 25554 transitions. [2020-11-11 14:53:28,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-11-11 14:53:28,565 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:53:28,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:53:28,582 INFO L225 Difference]: With dead ends: 9543 [2020-11-11 14:53:28,582 INFO L226 Difference]: Without dead ends: 9179 [2020-11-11 14:53:28,583 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1079, Invalid=3613, Unknown=0, NotChecked=0, Total=4692 [2020-11-11 14:53:28,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9179 states. [2020-11-11 14:53:28,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9179 to 4999. [2020-11-11 14:53:28,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4999 states, 4998 states have (on average 2.779311724689876) internal successors, (13891), 4998 states have internal predecessors, (13891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:28,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4999 states to 4999 states and 13891 transitions. [2020-11-11 14:53:28,704 INFO L78 Accepts]: Start accepts. Automaton has 4999 states and 13891 transitions. Word has length 58 [2020-11-11 14:53:28,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:53:28,704 INFO L481 AbstractCegarLoop]: Abstraction has 4999 states and 13891 transitions. [2020-11-11 14:53:28,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:28,704 INFO L276 IsEmpty]: Start isEmpty. Operand 4999 states and 13891 transitions. [2020-11-11 14:53:28,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:53:28,709 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:53:28,710 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:53:28,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:53:28,910 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:53:28,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:53:28,911 INFO L82 PathProgramCache]: Analyzing trace with hash 900839287, now seen corresponding path program 74 times [2020-11-11 14:53:28,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:53:28,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90003888] [2020-11-11 14:53:28,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:53:28,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:53:29,163 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:53:29,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90003888] [2020-11-11 14:53:29,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011926532] [2020-11-11 14:53:29,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:53:29,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 14:53:29,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:53:29,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:53:29,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:53:29,589 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:53:29,597 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:53:29,605 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:53:29,676 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:53:29,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:53:29,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:53:29,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057683931] [2020-11-11 14:53:29,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:53:29,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:53:29,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:53:29,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:53:29,678 INFO L87 Difference]: Start difference. First operand 4999 states and 13891 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:32,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:53:32,365 INFO L93 Difference]: Finished difference Result 8607 states and 22609 transitions. [2020-11-11 14:53:32,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-11 14:53:32,366 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:53:32,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:53:32,378 INFO L225 Difference]: With dead ends: 8607 [2020-11-11 14:53:32,379 INFO L226 Difference]: Without dead ends: 8455 [2020-11-11 14:53:32,379 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=782, Invalid=2524, Unknown=0, NotChecked=0, Total=3306 [2020-11-11 14:53:32,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8455 states. [2020-11-11 14:53:32,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8455 to 5079. [2020-11-11 14:53:32,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5079 states, 5078 states have (on average 2.784757778653013) internal successors, (14141), 5078 states have internal predecessors, (14141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:32,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5079 states to 5079 states and 14141 transitions. [2020-11-11 14:53:32,512 INFO L78 Accepts]: Start accepts. Automaton has 5079 states and 14141 transitions. Word has length 58 [2020-11-11 14:53:32,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:53:32,512 INFO L481 AbstractCegarLoop]: Abstraction has 5079 states and 14141 transitions. [2020-11-11 14:53:32,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:32,512 INFO L276 IsEmpty]: Start isEmpty. Operand 5079 states and 14141 transitions. [2020-11-11 14:53:32,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:53:32,517 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:53:32,517 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:53:32,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:53:32,718 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:53:32,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:53:32,720 INFO L82 PathProgramCache]: Analyzing trace with hash -57341125, now seen corresponding path program 75 times [2020-11-11 14:53:32,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:53:32,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206375428] [2020-11-11 14:53:32,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:53:32,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:53:33,089 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:53:33,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206375428] [2020-11-11 14:53:33,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333872278] [2020-11-11 14:53:33,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:53:33,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-11 14:53:33,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:53:33,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:53:33,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:53:33,519 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 14:53:33,524 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 14:53:33,529 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 14:53:33,719 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:53:33,728 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:53:33,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:53:33,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-11 14:53:33,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654397228] [2020-11-11 14:53:33,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 14:53:33,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:53:33,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 14:53:33,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-11-11 14:53:33,730 INFO L87 Difference]: Start difference. First operand 5079 states and 14141 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:37,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:53:37,691 INFO L93 Difference]: Finished difference Result 9966 states and 26534 transitions. [2020-11-11 14:53:37,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-11-11 14:53:37,692 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:53:37,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:53:37,705 INFO L225 Difference]: With dead ends: 9966 [2020-11-11 14:53:37,706 INFO L226 Difference]: Without dead ends: 9602 [2020-11-11 14:53:37,706 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1048, Invalid=3374, Unknown=0, NotChecked=0, Total=4422 [2020-11-11 14:53:37,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9602 states. [2020-11-11 14:53:37,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9602 to 4899. [2020-11-11 14:53:37,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4899 states, 4898 states have (on average 2.7666394446712945) internal successors, (13551), 4898 states have internal predecessors, (13551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:37,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4899 states to 4899 states and 13551 transitions. [2020-11-11 14:53:37,811 INFO L78 Accepts]: Start accepts. Automaton has 4899 states and 13551 transitions. Word has length 58 [2020-11-11 14:53:37,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:53:37,811 INFO L481 AbstractCegarLoop]: Abstraction has 4899 states and 13551 transitions. [2020-11-11 14:53:37,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:37,811 INFO L276 IsEmpty]: Start isEmpty. Operand 4899 states and 13551 transitions. [2020-11-11 14:53:37,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:53:37,816 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:53:37,816 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:53:38,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:53:38,017 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:53:38,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:53:38,018 INFO L82 PathProgramCache]: Analyzing trace with hash 664851141, now seen corresponding path program 76 times [2020-11-11 14:53:38,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:53:38,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12390707] [2020-11-11 14:53:38,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:53:38,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:53:38,313 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:53:38,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12390707] [2020-11-11 14:53:38,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654375699] [2020-11-11 14:53:38,313 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:53:38,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 14:53:38,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:53:38,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 14:53:38,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:53:38,688 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:53:38,721 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:53:38,737 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:53:38,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:53:38,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-11 14:53:38,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801477080] [2020-11-11 14:53:38,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 14:53:38,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:53:38,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 14:53:38,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2020-11-11 14:53:38,739 INFO L87 Difference]: Start difference. First operand 4899 states and 13551 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:42,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:53:42,215 INFO L93 Difference]: Finished difference Result 9033 states and 23941 transitions. [2020-11-11 14:53:42,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-11-11 14:53:42,218 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:53:42,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:53:42,231 INFO L225 Difference]: With dead ends: 9033 [2020-11-11 14:53:42,231 INFO L226 Difference]: Without dead ends: 8669 [2020-11-11 14:53:42,232 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=894, Invalid=2766, Unknown=0, NotChecked=0, Total=3660 [2020-11-11 14:53:42,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8669 states. [2020-11-11 14:53:42,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8669 to 4981. [2020-11-11 14:53:42,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4981 states, 4980 states have (on average 2.781526104417671) internal successors, (13852), 4980 states have internal predecessors, (13852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:42,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4981 states to 4981 states and 13852 transitions. [2020-11-11 14:53:42,341 INFO L78 Accepts]: Start accepts. Automaton has 4981 states and 13852 transitions. Word has length 58 [2020-11-11 14:53:42,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:53:42,342 INFO L481 AbstractCegarLoop]: Abstraction has 4981 states and 13852 transitions. [2020-11-11 14:53:42,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:42,342 INFO L276 IsEmpty]: Start isEmpty. Operand 4981 states and 13852 transitions. [2020-11-11 14:53:42,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:53:42,348 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:53:42,348 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:53:42,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:53:42,549 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:53:42,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:53:42,550 INFO L82 PathProgramCache]: Analyzing trace with hash -309722291, now seen corresponding path program 13 times [2020-11-11 14:53:42,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:53:42,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990793402] [2020-11-11 14:53:42,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:53:42,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:53:42,834 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:53:42,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990793402] [2020-11-11 14:53:42,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117119747] [2020-11-11 14:53:42,834 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:53:42,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:53:42,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:53:42,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:53:43,302 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:53:43,347 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:53:43,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:53:43,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:53:43,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365342086] [2020-11-11 14:53:43,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:53:43,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:53:43,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:53:43,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:53:43,349 INFO L87 Difference]: Start difference. First operand 4981 states and 13852 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:45,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:53:45,256 INFO L93 Difference]: Finished difference Result 7941 states and 20317 transitions. [2020-11-11 14:53:45,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-11 14:53:45,258 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:53:45,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:53:45,269 INFO L225 Difference]: With dead ends: 7941 [2020-11-11 14:53:45,270 INFO L226 Difference]: Without dead ends: 7549 [2020-11-11 14:53:45,270 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=525, Invalid=2025, Unknown=0, NotChecked=0, Total=2550 [2020-11-11 14:53:45,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7549 states. [2020-11-11 14:53:45,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7549 to 4961. [2020-11-11 14:53:45,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4961 states, 4960 states have (on average 2.7866935483870967) internal successors, (13822), 4960 states have internal predecessors, (13822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:45,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4961 states to 4961 states and 13822 transitions. [2020-11-11 14:53:45,371 INFO L78 Accepts]: Start accepts. Automaton has 4961 states and 13822 transitions. Word has length 58 [2020-11-11 14:53:45,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:53:45,371 INFO L481 AbstractCegarLoop]: Abstraction has 4961 states and 13822 transitions. [2020-11-11 14:53:45,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:45,371 INFO L276 IsEmpty]: Start isEmpty. Operand 4961 states and 13822 transitions. [2020-11-11 14:53:45,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:53:45,377 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:53:45,377 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:53:45,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:53:45,578 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:53:45,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:53:45,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1272261133, now seen corresponding path program 14 times [2020-11-11 14:53:45,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:53:45,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88294719] [2020-11-11 14:53:45,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:53:45,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:53:45,908 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:53:45,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88294719] [2020-11-11 14:53:45,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995556376] [2020-11-11 14:53:45,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:53:45,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 14:53:45,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:53:45,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:53:45,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:53:46,288 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:53:46,331 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:53:46,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:53:46,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:53:46,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741658808] [2020-11-11 14:53:46,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:53:46,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:53:46,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:53:46,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:53:46,332 INFO L87 Difference]: Start difference. First operand 4961 states and 13822 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:48,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:53:48,683 INFO L93 Difference]: Finished difference Result 7916 states and 20424 transitions. [2020-11-11 14:53:48,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-11-11 14:53:48,684 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:53:48,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:53:48,697 INFO L225 Difference]: With dead ends: 7916 [2020-11-11 14:53:48,697 INFO L226 Difference]: Without dead ends: 7524 [2020-11-11 14:53:48,697 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=669, Invalid=2523, Unknown=0, NotChecked=0, Total=3192 [2020-11-11 14:53:48,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7524 states. [2020-11-11 14:53:48,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7524 to 4864. [2020-11-11 14:53:48,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4864 states, 4863 states have (on average 2.7914867365823564) internal successors, (13575), 4863 states have internal predecessors, (13575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:48,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4864 states to 4864 states and 13575 transitions. [2020-11-11 14:53:48,795 INFO L78 Accepts]: Start accepts. Automaton has 4864 states and 13575 transitions. Word has length 58 [2020-11-11 14:53:48,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:53:48,795 INFO L481 AbstractCegarLoop]: Abstraction has 4864 states and 13575 transitions. [2020-11-11 14:53:48,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:48,795 INFO L276 IsEmpty]: Start isEmpty. Operand 4864 states and 13575 transitions. [2020-11-11 14:53:48,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:53:48,801 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:53:48,801 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:53:49,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:53:49,002 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:53:49,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:53:49,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1290898547, now seen corresponding path program 15 times [2020-11-11 14:53:49,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:53:49,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289728931] [2020-11-11 14:53:49,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:53:49,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:53:49,419 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:53:49,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289728931] [2020-11-11 14:53:49,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086719792] [2020-11-11 14:53:49,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:53:49,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-11 14:53:49,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:53:49,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:53:49,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:53:49,859 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:53:49,907 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:53:49,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:53:49,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:53:49,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543320849] [2020-11-11 14:53:49,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:53:49,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:53:49,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:53:49,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:53:49,909 INFO L87 Difference]: Start difference. First operand 4864 states and 13575 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:52,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:53:52,420 INFO L93 Difference]: Finished difference Result 7979 states and 20769 transitions. [2020-11-11 14:53:52,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-11-11 14:53:52,422 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:53:52,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:53:52,432 INFO L225 Difference]: With dead ends: 7979 [2020-11-11 14:53:52,432 INFO L226 Difference]: Without dead ends: 7499 [2020-11-11 14:53:52,432 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=759, Invalid=2781, Unknown=0, NotChecked=0, Total=3540 [2020-11-11 14:53:52,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7499 states. [2020-11-11 14:53:52,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7499 to 4971. [2020-11-11 14:53:52,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4971 states, 4970 states have (on average 2.8) internal successors, (13916), 4970 states have internal predecessors, (13916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:52,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4971 states to 4971 states and 13916 transitions. [2020-11-11 14:53:52,518 INFO L78 Accepts]: Start accepts. Automaton has 4971 states and 13916 transitions. Word has length 58 [2020-11-11 14:53:52,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:53:52,518 INFO L481 AbstractCegarLoop]: Abstraction has 4971 states and 13916 transitions. [2020-11-11 14:53:52,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:52,518 INFO L276 IsEmpty]: Start isEmpty. Operand 4971 states and 13916 transitions. [2020-11-11 14:53:52,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:53:52,522 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:53:52,523 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:53:52,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-11-11 14:53:52,723 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:53:52,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:53:52,724 INFO L82 PathProgramCache]: Analyzing trace with hash 2045888337, now seen corresponding path program 16 times [2020-11-11 14:53:52,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:53:52,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685452608] [2020-11-11 14:53:52,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:53:52,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:53:53,036 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:53:53,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685452608] [2020-11-11 14:53:53,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480298055] [2020-11-11 14:53:53,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:53:53,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 14:53:53,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:53:53,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 14:53:53,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:53:53,396 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 14:53:53,422 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:53:53,431 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:53:53,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:53:53,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-11 14:53:53,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681479896] [2020-11-11 14:53:53,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 14:53:53,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:53:53,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 14:53:53,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2020-11-11 14:53:53,432 INFO L87 Difference]: Start difference. First operand 4971 states and 13916 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:56,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:53:56,279 INFO L93 Difference]: Finished difference Result 8569 states and 23017 transitions. [2020-11-11 14:53:56,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-11-11 14:53:56,282 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:53:56,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:53:56,294 INFO L225 Difference]: With dead ends: 8569 [2020-11-11 14:53:56,294 INFO L226 Difference]: Without dead ends: 7929 [2020-11-11 14:53:56,295 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1294 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=942, Invalid=3218, Unknown=0, NotChecked=0, Total=4160 [2020-11-11 14:53:56,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7929 states. [2020-11-11 14:53:56,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7929 to 4857. [2020-11-11 14:53:56,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4857 states, 4856 states have (on average 2.807866556836903) internal successors, (13635), 4856 states have internal predecessors, (13635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:56,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4857 states to 4857 states and 13635 transitions. [2020-11-11 14:53:56,388 INFO L78 Accepts]: Start accepts. Automaton has 4857 states and 13635 transitions. Word has length 58 [2020-11-11 14:53:56,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:53:56,388 INFO L481 AbstractCegarLoop]: Abstraction has 4857 states and 13635 transitions. [2020-11-11 14:53:56,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:56,388 INFO L276 IsEmpty]: Start isEmpty. Operand 4857 states and 13635 transitions. [2020-11-11 14:53:56,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:53:56,392 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:53:56,393 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:53:56,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:53:56,595 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:53:56,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:53:56,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1386250893, now seen corresponding path program 77 times [2020-11-11 14:53:56,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:53:56,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347106780] [2020-11-11 14:53:56,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:53:56,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:53:56,867 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:53:56,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347106780] [2020-11-11 14:53:56,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702288422] [2020-11-11 14:53:56,867 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:53:56,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-11 14:53:56,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:53:56,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:53:56,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:53:57,415 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:53:57,417 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:53:57,419 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:53:57,489 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:53:57,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:53:57,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:53:57,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122524286] [2020-11-11 14:53:57,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:53:57,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:53:57,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:53:57,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:53:57,491 INFO L87 Difference]: Start difference. First operand 4857 states and 13635 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:58,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:53:58,989 INFO L93 Difference]: Finished difference Result 7111 states and 18655 transitions. [2020-11-11 14:53:58,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 14:53:58,991 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:53:58,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:53:59,001 INFO L225 Difference]: With dead ends: 7111 [2020-11-11 14:53:59,001 INFO L226 Difference]: Without dead ends: 6959 [2020-11-11 14:53:59,002 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=365, Invalid=1117, Unknown=0, NotChecked=0, Total=1482 [2020-11-11 14:53:59,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6959 states. [2020-11-11 14:53:59,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6959 to 4832. [2020-11-11 14:53:59,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4832 states, 4831 states have (on average 2.8110122127923827) internal successors, (13580), 4831 states have internal predecessors, (13580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:59,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4832 states to 4832 states and 13580 transitions. [2020-11-11 14:53:59,096 INFO L78 Accepts]: Start accepts. Automaton has 4832 states and 13580 transitions. Word has length 58 [2020-11-11 14:53:59,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:53:59,096 INFO L481 AbstractCegarLoop]: Abstraction has 4832 states and 13580 transitions. [2020-11-11 14:53:59,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:59,097 INFO L276 IsEmpty]: Start isEmpty. Operand 4832 states and 13580 transitions. [2020-11-11 14:53:59,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:53:59,102 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:53:59,102 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:53:59,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2020-11-11 14:53:59,303 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:53:59,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:53:59,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1912390435, now seen corresponding path program 78 times [2020-11-11 14:53:59,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:53:59,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039524940] [2020-11-11 14:53:59,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:53:59,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:53:59,620 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:53:59,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039524940] [2020-11-11 14:53:59,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812657999] [2020-11-11 14:53:59,620 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:53:59,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-11 14:53:59,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:53:59,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:53:59,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:54:00,219 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:00,222 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:00,225 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:00,298 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:00,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:54:00,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:54:00,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69002566] [2020-11-11 14:54:00,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:54:00,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:54:00,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:54:00,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:54:00,300 INFO L87 Difference]: Start difference. First operand 4832 states and 13580 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:02,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:54:02,279 INFO L93 Difference]: Finished difference Result 7572 states and 19636 transitions. [2020-11-11 14:54:02,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 14:54:02,280 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:54:02,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:54:02,292 INFO L225 Difference]: With dead ends: 7572 [2020-11-11 14:54:02,292 INFO L226 Difference]: Without dead ends: 7420 [2020-11-11 14:54:02,293 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=397, Invalid=1409, Unknown=0, NotChecked=0, Total=1806 [2020-11-11 14:54:02,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7420 states. [2020-11-11 14:54:02,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7420 to 4834. [2020-11-11 14:54:02,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4834 states, 4833 states have (on average 2.814814814814815) internal successors, (13604), 4833 states have internal predecessors, (13604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:02,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4834 states to 4834 states and 13604 transitions. [2020-11-11 14:54:02,381 INFO L78 Accepts]: Start accepts. Automaton has 4834 states and 13604 transitions. Word has length 58 [2020-11-11 14:54:02,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:54:02,381 INFO L481 AbstractCegarLoop]: Abstraction has 4834 states and 13604 transitions. [2020-11-11 14:54:02,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:02,381 INFO L276 IsEmpty]: Start isEmpty. Operand 4834 states and 13604 transitions. [2020-11-11 14:54:02,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:54:02,386 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:54:02,386 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:54:02,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:54:02,587 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:54:02,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:54:02,588 INFO L82 PathProgramCache]: Analyzing trace with hash 920720089, now seen corresponding path program 79 times [2020-11-11 14:54:02,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:54:02,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684344369] [2020-11-11 14:54:02,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:54:02,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:54:02,823 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:02,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684344369] [2020-11-11 14:54:02,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703095348] [2020-11-11 14:54:02,823 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:54:02,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:54:02,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:54:02,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:54:03,478 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:03,482 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:03,485 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:03,563 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:03,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:54:03,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:54:03,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436377257] [2020-11-11 14:54:03,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:54:03,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:54:03,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:54:03,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:54:03,565 INFO L87 Difference]: Start difference. First operand 4834 states and 13604 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:06,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:54:06,293 INFO L93 Difference]: Finished difference Result 7363 states and 19444 transitions. [2020-11-11 14:54:06,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-11 14:54:06,294 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:54:06,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:54:06,307 INFO L225 Difference]: With dead ends: 7363 [2020-11-11 14:54:06,307 INFO L226 Difference]: Without dead ends: 7211 [2020-11-11 14:54:06,307 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=474, Invalid=1688, Unknown=0, NotChecked=0, Total=2162 [2020-11-11 14:54:06,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7211 states. [2020-11-11 14:54:06,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7211 to 4901. [2020-11-11 14:54:06,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4901 states, 4900 states have (on average 2.822244897959184) internal successors, (13829), 4900 states have internal predecessors, (13829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:06,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4901 states to 4901 states and 13829 transitions. [2020-11-11 14:54:06,406 INFO L78 Accepts]: Start accepts. Automaton has 4901 states and 13829 transitions. Word has length 58 [2020-11-11 14:54:06,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:54:06,406 INFO L481 AbstractCegarLoop]: Abstraction has 4901 states and 13829 transitions. [2020-11-11 14:54:06,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:06,406 INFO L276 IsEmpty]: Start isEmpty. Operand 4901 states and 13829 transitions. [2020-11-11 14:54:06,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:54:06,412 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:54:06,412 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:54:06,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-11-11 14:54:06,613 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:54:06,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:54:06,614 INFO L82 PathProgramCache]: Analyzing trace with hash 902082675, now seen corresponding path program 80 times [2020-11-11 14:54:06,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:54:06,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970458622] [2020-11-11 14:54:06,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:54:06,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:54:06,923 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:06,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970458622] [2020-11-11 14:54:06,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186599885] [2020-11-11 14:54:06,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:54:06,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 14:54:06,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:54:06,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:54:06,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:54:07,643 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:07,646 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:07,648 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:07,719 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:07,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:54:07,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:54:07,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869271886] [2020-11-11 14:54:07,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:54:07,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:54:07,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:54:07,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:54:07,721 INFO L87 Difference]: Start difference. First operand 4901 states and 13829 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:10,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:54:10,572 INFO L93 Difference]: Finished difference Result 7861 states and 21132 transitions. [2020-11-11 14:54:10,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-11 14:54:10,575 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:54:10,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:54:10,587 INFO L225 Difference]: With dead ends: 7861 [2020-11-11 14:54:10,587 INFO L226 Difference]: Without dead ends: 7709 [2020-11-11 14:54:10,588 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=608, Invalid=2044, Unknown=0, NotChecked=0, Total=2652 [2020-11-11 14:54:10,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7709 states. [2020-11-11 14:54:10,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7709 to 5031. [2020-11-11 14:54:10,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5031 states, 5030 states have (on average 2.832803180914513) internal successors, (14249), 5030 states have internal predecessors, (14249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:10,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5031 states to 5031 states and 14249 transitions. [2020-11-11 14:54:10,690 INFO L78 Accepts]: Start accepts. Automaton has 5031 states and 14249 transitions. Word has length 58 [2020-11-11 14:54:10,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:54:10,690 INFO L481 AbstractCegarLoop]: Abstraction has 5031 states and 14249 transitions. [2020-11-11 14:54:10,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:10,690 INFO L276 IsEmpty]: Start isEmpty. Operand 5031 states and 14249 transitions. [2020-11-11 14:54:10,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:54:10,696 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:54:10,696 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:54:10,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-11-11 14:54:10,897 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:54:10,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:54:10,897 INFO L82 PathProgramCache]: Analyzing trace with hash -56097737, now seen corresponding path program 81 times [2020-11-11 14:54:10,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:54:10,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240740957] [2020-11-11 14:54:10,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:54:10,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:54:11,222 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:11,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240740957] [2020-11-11 14:54:11,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052556615] [2020-11-11 14:54:11,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:54:11,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-11 14:54:11,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:54:11,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:54:11,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:54:11,776 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 14:54:11,860 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:11,872 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:11,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:54:11,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-11 14:54:11,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725039145] [2020-11-11 14:54:11,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 14:54:11,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:54:11,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 14:54:11,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-11-11 14:54:11,873 INFO L87 Difference]: Start difference. First operand 5031 states and 14249 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:16,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:54:16,073 INFO L93 Difference]: Finished difference Result 9169 states and 24872 transitions. [2020-11-11 14:54:16,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-11-11 14:54:16,075 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:54:16,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:54:16,089 INFO L225 Difference]: With dead ends: 9169 [2020-11-11 14:54:16,089 INFO L226 Difference]: Without dead ends: 8805 [2020-11-11 14:54:16,090 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=915, Invalid=3117, Unknown=0, NotChecked=0, Total=4032 [2020-11-11 14:54:16,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8805 states. [2020-11-11 14:54:16,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8805 to 4779. [2020-11-11 14:54:16,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4779 states, 4778 states have (on average 2.8185433235663457) internal successors, (13467), 4778 states have internal predecessors, (13467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:16,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4779 states to 4779 states and 13467 transitions. [2020-11-11 14:54:16,192 INFO L78 Accepts]: Start accepts. Automaton has 4779 states and 13467 transitions. Word has length 58 [2020-11-11 14:54:16,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:54:16,192 INFO L481 AbstractCegarLoop]: Abstraction has 4779 states and 13467 transitions. [2020-11-11 14:54:16,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:16,192 INFO L276 IsEmpty]: Start isEmpty. Operand 4779 states and 13467 transitions. [2020-11-11 14:54:16,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-11-11 14:54:16,197 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:54:16,197 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:54:16,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-11-11 14:54:16,398 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:54:16,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:54:16,399 INFO L82 PathProgramCache]: Analyzing trace with hash -774621859, now seen corresponding path program 82 times [2020-11-11 14:54:16,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:54:16,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174231408] [2020-11-11 14:54:16,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:54:16,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:54:16,658 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:16,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174231408] [2020-11-11 14:54:16,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608422047] [2020-11-11 14:54:16,658 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:54:16,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 14:54:16,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:54:16,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 14:54:16,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:54:17,052 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:17,073 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:17,081 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:17,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:54:17,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-11 14:54:17,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92560128] [2020-11-11 14:54:17,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 14:54:17,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:54:17,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 14:54:17,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-11-11 14:54:17,082 INFO L87 Difference]: Start difference. First operand 4779 states and 13467 transitions. Second operand has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:19,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:54:19,888 INFO L93 Difference]: Finished difference Result 8721 states and 23349 transitions. [2020-11-11 14:54:19,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-11 14:54:19,891 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2020-11-11 14:54:19,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:54:19,905 INFO L225 Difference]: With dead ends: 8721 [2020-11-11 14:54:19,906 INFO L226 Difference]: Without dead ends: 8337 [2020-11-11 14:54:19,906 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=738, Invalid=2232, Unknown=0, NotChecked=0, Total=2970 [2020-11-11 14:54:19,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8337 states. [2020-11-11 14:54:20,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8337 to 4779. [2020-11-11 14:54:20,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4779 states, 4778 states have (on average 2.8185433235663457) internal successors, (13467), 4778 states have internal predecessors, (13467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:20,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4779 states to 4779 states and 13467 transitions. [2020-11-11 14:54:20,076 INFO L78 Accepts]: Start accepts. Automaton has 4779 states and 13467 transitions. Word has length 59 [2020-11-11 14:54:20,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:54:20,076 INFO L481 AbstractCegarLoop]: Abstraction has 4779 states and 13467 transitions. [2020-11-11 14:54:20,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:20,076 INFO L276 IsEmpty]: Start isEmpty. Operand 4779 states and 13467 transitions. [2020-11-11 14:54:20,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-11-11 14:54:20,081 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:54:20,081 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:54:20,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:54:20,282 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:54:20,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:54:20,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1759181145, now seen corresponding path program 17 times [2020-11-11 14:54:20,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:54:20,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220991853] [2020-11-11 14:54:20,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:54:20,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:54:20,589 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:20,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220991853] [2020-11-11 14:54:20,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660612449] [2020-11-11 14:54:20,590 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:54:20,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-11 14:54:20,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:54:20,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:54:20,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:54:20,949 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 14:54:20,973 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:20,982 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:20,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:54:20,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-11 14:54:20,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946953852] [2020-11-11 14:54:20,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 14:54:20,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:54:20,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 14:54:20,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-11-11 14:54:20,983 INFO L87 Difference]: Start difference. First operand 4779 states and 13467 transitions. Second operand has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:23,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:54:23,543 INFO L93 Difference]: Finished difference Result 8423 states and 22663 transitions. [2020-11-11 14:54:23,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-11 14:54:23,545 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2020-11-11 14:54:23,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:54:23,557 INFO L225 Difference]: With dead ends: 8423 [2020-11-11 14:54:23,557 INFO L226 Difference]: Without dead ends: 8039 [2020-11-11 14:54:23,557 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1003 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=817, Invalid=2489, Unknown=0, NotChecked=0, Total=3306 [2020-11-11 14:54:23,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8039 states. [2020-11-11 14:54:23,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8039 to 4609. [2020-11-11 14:54:23,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4609 states, 4608 states have (on average 2.816189236111111) internal successors, (12977), 4608 states have internal predecessors, (12977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:23,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4609 states to 4609 states and 12977 transitions. [2020-11-11 14:54:23,648 INFO L78 Accepts]: Start accepts. Automaton has 4609 states and 12977 transitions. Word has length 59 [2020-11-11 14:54:23,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:54:23,648 INFO L481 AbstractCegarLoop]: Abstraction has 4609 states and 12977 transitions. [2020-11-11 14:54:23,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:23,648 INFO L276 IsEmpty]: Start isEmpty. Operand 4609 states and 12977 transitions. [2020-11-11 14:54:23,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:54:23,653 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:54:23,653 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:54:23,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-11-11 14:54:23,854 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:54:23,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:54:23,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1078831882, now seen corresponding path program 83 times [2020-11-11 14:54:23,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:54:23,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241476581] [2020-11-11 14:54:23,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:54:23,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:54:24,332 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:24,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241476581] [2020-11-11 14:54:24,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198323069] [2020-11-11 14:54:24,333 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:54:24,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-11 14:54:24,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:54:24,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:54:24,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:54:25,228 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:25,246 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:25,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:54:25,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:54:25,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612800125] [2020-11-11 14:54:25,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:54:25,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:54:25,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:54:25,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:54:25,248 INFO L87 Difference]: Start difference. First operand 4609 states and 12977 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:33,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:54:33,433 INFO L93 Difference]: Finished difference Result 7188 states and 18712 transitions. [2020-11-11 14:54:33,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 14:54:33,434 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-11 14:54:33,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:54:33,445 INFO L225 Difference]: With dead ends: 7188 [2020-11-11 14:54:33,445 INFO L226 Difference]: Without dead ends: 6948 [2020-11-11 14:54:33,445 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=381, Invalid=1025, Unknown=0, NotChecked=0, Total=1406 [2020-11-11 14:54:33,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6948 states. [2020-11-11 14:54:33,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6948 to 4809. [2020-11-11 14:54:33,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4809 states, 4808 states have (on average 2.790557404326123) internal successors, (13417), 4808 states have internal predecessors, (13417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:33,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4809 states to 4809 states and 13417 transitions. [2020-11-11 14:54:33,534 INFO L78 Accepts]: Start accepts. Automaton has 4809 states and 13417 transitions. Word has length 63 [2020-11-11 14:54:33,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:54:33,535 INFO L481 AbstractCegarLoop]: Abstraction has 4809 states and 13417 transitions. [2020-11-11 14:54:33,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:33,535 INFO L276 IsEmpty]: Start isEmpty. Operand 4809 states and 13417 transitions. [2020-11-11 14:54:33,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:54:33,540 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:54:33,540 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:54:33,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:54:33,741 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:54:33,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:54:33,742 INFO L82 PathProgramCache]: Analyzing trace with hash 680716004, now seen corresponding path program 84 times [2020-11-11 14:54:33,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:54:33,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446288472] [2020-11-11 14:54:33,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:54:33,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:54:34,112 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:34,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446288472] [2020-11-11 14:54:34,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961534136] [2020-11-11 14:54:34,112 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:54:34,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-11 14:54:34,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:54:34,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:54:34,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:54:34,966 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:35,114 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:35,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:54:35,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:54:35,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089829019] [2020-11-11 14:54:35,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:54:35,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:54:35,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:54:35,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:54:35,117 INFO L87 Difference]: Start difference. First operand 4809 states and 13417 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:36,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:54:36,798 INFO L93 Difference]: Finished difference Result 6925 states and 18127 transitions. [2020-11-11 14:54:36,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 14:54:36,801 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-11 14:54:36,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:54:36,812 INFO L225 Difference]: With dead ends: 6925 [2020-11-11 14:54:36,813 INFO L226 Difference]: Without dead ends: 6773 [2020-11-11 14:54:36,813 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=360, Invalid=900, Unknown=0, NotChecked=0, Total=1260 [2020-11-11 14:54:36,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6773 states. [2020-11-11 14:54:36,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6773 to 4799. [2020-11-11 14:54:36,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4799 states, 4798 states have (on average 2.791162984576907) internal successors, (13392), 4798 states have internal predecessors, (13392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:36,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4799 states to 4799 states and 13392 transitions. [2020-11-11 14:54:36,908 INFO L78 Accepts]: Start accepts. Automaton has 4799 states and 13392 transitions. Word has length 63 [2020-11-11 14:54:36,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:54:36,908 INFO L481 AbstractCegarLoop]: Abstraction has 4799 states and 13392 transitions. [2020-11-11 14:54:36,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:36,909 INFO L276 IsEmpty]: Start isEmpty. Operand 4799 states and 13392 transitions. [2020-11-11 14:54:36,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:54:36,914 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:54:36,914 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:54:37,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-11-11 14:54:37,117 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:54:37,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:54:37,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1750158186, now seen corresponding path program 85 times [2020-11-11 14:54:37,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:54:37,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443328177] [2020-11-11 14:54:37,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:54:37,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:54:37,512 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:37,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443328177] [2020-11-11 14:54:37,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350813331] [2020-11-11 14:54:37,512 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:54:37,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:54:37,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:54:37,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:54:38,305 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:38,308 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:38,310 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:38,395 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:38,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:54:38,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:54:38,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086270323] [2020-11-11 14:54:38,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:54:38,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:54:38,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:54:38,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:54:38,399 INFO L87 Difference]: Start difference. First operand 4799 states and 13392 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:40,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:54:40,096 INFO L93 Difference]: Finished difference Result 7036 states and 18344 transitions. [2020-11-11 14:54:40,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 14:54:40,098 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-11 14:54:40,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:54:40,109 INFO L225 Difference]: With dead ends: 7036 [2020-11-11 14:54:40,109 INFO L226 Difference]: Without dead ends: 6884 [2020-11-11 14:54:40,109 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2020-11-11 14:54:40,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6884 states. [2020-11-11 14:54:40,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6884 to 4809. [2020-11-11 14:54:40,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4809 states, 4808 states have (on average 2.790557404326123) internal successors, (13417), 4808 states have internal predecessors, (13417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:40,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4809 states to 4809 states and 13417 transitions. [2020-11-11 14:54:40,249 INFO L78 Accepts]: Start accepts. Automaton has 4809 states and 13417 transitions. Word has length 63 [2020-11-11 14:54:40,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:54:40,249 INFO L481 AbstractCegarLoop]: Abstraction has 4809 states and 13417 transitions. [2020-11-11 14:54:40,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:40,249 INFO L276 IsEmpty]: Start isEmpty. Operand 4809 states and 13417 transitions. [2020-11-11 14:54:40,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:54:40,255 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:54:40,255 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:54:40,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:54:40,456 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:54:40,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:54:40,457 INFO L82 PathProgramCache]: Analyzing trace with hash -222117746, now seen corresponding path program 86 times [2020-11-11 14:54:40,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:54:40,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682344202] [2020-11-11 14:54:40,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:54:40,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:54:40,843 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:40,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682344202] [2020-11-11 14:54:40,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146024244] [2020-11-11 14:54:40,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:54:40,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 14:54:40,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:54:40,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:54:40,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:54:41,620 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:41,623 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:41,626 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:41,700 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:41,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:54:41,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:54:41,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207408824] [2020-11-11 14:54:41,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:54:41,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:54:41,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:54:41,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:54:41,702 INFO L87 Difference]: Start difference. First operand 4809 states and 13417 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:43,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:54:43,632 INFO L93 Difference]: Finished difference Result 7156 states and 18584 transitions. [2020-11-11 14:54:43,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 14:54:43,634 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-11 14:54:43,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:54:43,644 INFO L225 Difference]: With dead ends: 7156 [2020-11-11 14:54:43,644 INFO L226 Difference]: Without dead ends: 7004 [2020-11-11 14:54:43,645 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=453, Invalid=1187, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 14:54:43,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7004 states. [2020-11-11 14:54:43,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7004 to 4849. [2020-11-11 14:54:43,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4849 states, 4848 states have (on average 2.78506600660066) internal successors, (13502), 4848 states have internal predecessors, (13502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:43,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4849 states to 4849 states and 13502 transitions. [2020-11-11 14:54:43,728 INFO L78 Accepts]: Start accepts. Automaton has 4849 states and 13502 transitions. Word has length 63 [2020-11-11 14:54:43,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:54:43,728 INFO L481 AbstractCegarLoop]: Abstraction has 4849 states and 13502 transitions. [2020-11-11 14:54:43,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:43,728 INFO L276 IsEmpty]: Start isEmpty. Operand 4849 states and 13502 transitions. [2020-11-11 14:54:43,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:54:43,733 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:54:43,733 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:54:43,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:54:43,934 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:54:43,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:54:43,935 INFO L82 PathProgramCache]: Analyzing trace with hash -2021080056, now seen corresponding path program 87 times [2020-11-11 14:54:43,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:54:43,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241900688] [2020-11-11 14:54:43,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:54:43,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:54:44,366 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:44,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241900688] [2020-11-11 14:54:44,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121052282] [2020-11-11 14:54:44,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:54:44,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-11 14:54:44,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:54:44,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:54:44,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:54:45,161 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:45,164 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:45,168 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:45,172 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:45,176 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:45,179 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:45,181 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:45,183 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:45,318 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:45,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:54:45,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:54:45,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088428377] [2020-11-11 14:54:45,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:54:45,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:54:45,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:54:45,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:54:45,319 INFO L87 Difference]: Start difference. First operand 4849 states and 13502 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:47,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:54:47,177 INFO L93 Difference]: Finished difference Result 6986 states and 18274 transitions. [2020-11-11 14:54:47,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 14:54:47,179 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-11 14:54:47,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:54:47,190 INFO L225 Difference]: With dead ends: 6986 [2020-11-11 14:54:47,190 INFO L226 Difference]: Without dead ends: 6834 [2020-11-11 14:54:47,190 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=430, Invalid=1130, Unknown=0, NotChecked=0, Total=1560 [2020-11-11 14:54:47,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6834 states. [2020-11-11 14:54:47,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6834 to 4849. [2020-11-11 14:54:47,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4849 states, 4848 states have (on average 2.78506600660066) internal successors, (13502), 4848 states have internal predecessors, (13502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:47,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4849 states to 4849 states and 13502 transitions. [2020-11-11 14:54:47,322 INFO L78 Accepts]: Start accepts. Automaton has 4849 states and 13502 transitions. Word has length 63 [2020-11-11 14:54:47,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:54:47,322 INFO L481 AbstractCegarLoop]: Abstraction has 4849 states and 13502 transitions. [2020-11-11 14:54:47,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:47,322 INFO L276 IsEmpty]: Start isEmpty. Operand 4849 states and 13502 transitions. [2020-11-11 14:54:47,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:54:47,327 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:54:47,328 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:54:47,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2020-11-11 14:54:47,528 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:54:47,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:54:47,529 INFO L82 PathProgramCache]: Analyzing trace with hash 880201980, now seen corresponding path program 88 times [2020-11-11 14:54:47,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:54:47,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147720202] [2020-11-11 14:54:47,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:54:47,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:54:47,894 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:47,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147720202] [2020-11-11 14:54:47,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144187410] [2020-11-11 14:54:47,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:54:47,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 14:54:47,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:54:47,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:54:47,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:54:48,711 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:48,714 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:48,718 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:48,722 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:48,726 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:48,729 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:48,733 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:48,736 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:48,831 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:48,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:54:48,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:54:48,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269313964] [2020-11-11 14:54:48,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:54:48,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:54:48,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:54:48,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:54:48,833 INFO L87 Difference]: Start difference. First operand 4849 states and 13502 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:50,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:54:50,573 INFO L93 Difference]: Finished difference Result 6880 states and 18052 transitions. [2020-11-11 14:54:50,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 14:54:50,576 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-11 14:54:50,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:54:50,588 INFO L225 Difference]: With dead ends: 6880 [2020-11-11 14:54:50,588 INFO L226 Difference]: Without dead ends: 6728 [2020-11-11 14:54:50,589 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2020-11-11 14:54:50,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6728 states. [2020-11-11 14:54:50,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6728 to 4799. [2020-11-11 14:54:50,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4799 states, 4798 states have (on average 2.791162984576907) internal successors, (13392), 4798 states have internal predecessors, (13392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:50,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4799 states to 4799 states and 13392 transitions. [2020-11-11 14:54:50,686 INFO L78 Accepts]: Start accepts. Automaton has 4799 states and 13392 transitions. Word has length 63 [2020-11-11 14:54:50,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:54:50,686 INFO L481 AbstractCegarLoop]: Abstraction has 4799 states and 13392 transitions. [2020-11-11 14:54:50,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:50,686 INFO L276 IsEmpty]: Start isEmpty. Operand 4799 states and 13392 transitions. [2020-11-11 14:54:50,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:54:50,692 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:54:50,692 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:54:50,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-11-11 14:54:50,894 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:54:50,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:54:50,895 INFO L82 PathProgramCache]: Analyzing trace with hash -9321846, now seen corresponding path program 89 times [2020-11-11 14:54:50,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:54:50,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005917256] [2020-11-11 14:54:50,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:54:50,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:54:51,295 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:51,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005917256] [2020-11-11 14:54:51,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866132588] [2020-11-11 14:54:51,295 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:54:51,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-11 14:54:51,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:54:51,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:54:51,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:54:51,860 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:51,930 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:51,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:54:51,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:54:51,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561717429] [2020-11-11 14:54:51,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:54:51,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:54:51,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:54:51,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:54:51,931 INFO L87 Difference]: Start difference. First operand 4799 states and 13392 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:53,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:54:53,705 INFO L93 Difference]: Finished difference Result 7069 states and 18415 transitions. [2020-11-11 14:54:53,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 14:54:53,707 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-11 14:54:53,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:54:53,719 INFO L225 Difference]: With dead ends: 7069 [2020-11-11 14:54:53,719 INFO L226 Difference]: Without dead ends: 6917 [2020-11-11 14:54:53,719 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=463, Invalid=1343, Unknown=0, NotChecked=0, Total=1806 [2020-11-11 14:54:53,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6917 states. [2020-11-11 14:54:53,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6917 to 4849. [2020-11-11 14:54:53,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4849 states, 4848 states have (on average 2.78506600660066) internal successors, (13502), 4848 states have internal predecessors, (13502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:53,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4849 states to 4849 states and 13502 transitions. [2020-11-11 14:54:53,840 INFO L78 Accepts]: Start accepts. Automaton has 4849 states and 13502 transitions. Word has length 63 [2020-11-11 14:54:53,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:54:53,840 INFO L481 AbstractCegarLoop]: Abstraction has 4849 states and 13502 transitions. [2020-11-11 14:54:53,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:53,840 INFO L276 IsEmpty]: Start isEmpty. Operand 4849 states and 13502 transitions. [2020-11-11 14:54:53,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:54:53,847 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:54:53,847 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:54:54,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:54:54,061 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:54:54,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:54:54,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1518718594, now seen corresponding path program 90 times [2020-11-11 14:54:54,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:54:54,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314783468] [2020-11-11 14:54:54,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:54:54,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:54:54,446 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:54,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314783468] [2020-11-11 14:54:54,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623039582] [2020-11-11 14:54:54,446 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:54:54,505 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-11 14:54:54,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:54:54,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:54:54,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:54:55,052 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:55,109 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:55,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:54:55,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:54:55,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907665514] [2020-11-11 14:54:55,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:54:55,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:54:55,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:54:55,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:54:55,111 INFO L87 Difference]: Start difference. First operand 4849 states and 13502 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:56,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:54:56,892 INFO L93 Difference]: Finished difference Result 7270 states and 18822 transitions. [2020-11-11 14:54:56,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-11 14:54:56,894 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-11 14:54:56,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:54:56,905 INFO L225 Difference]: With dead ends: 7270 [2020-11-11 14:54:56,905 INFO L226 Difference]: Without dead ends: 7118 [2020-11-11 14:54:56,906 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=479, Invalid=1327, Unknown=0, NotChecked=0, Total=1806 [2020-11-11 14:54:56,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7118 states. [2020-11-11 14:54:56,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7118 to 4924. [2020-11-11 14:54:56,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4924 states, 4923 states have (on average 2.776152752386756) internal successors, (13667), 4923 states have internal predecessors, (13667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:56,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4924 states to 4924 states and 13667 transitions. [2020-11-11 14:54:56,990 INFO L78 Accepts]: Start accepts. Automaton has 4924 states and 13667 transitions. Word has length 63 [2020-11-11 14:54:56,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:54:56,991 INFO L481 AbstractCegarLoop]: Abstraction has 4924 states and 13667 transitions. [2020-11-11 14:54:56,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:56,991 INFO L276 IsEmpty]: Start isEmpty. Operand 4924 states and 13667 transitions. [2020-11-11 14:54:56,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:54:56,995 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:54:56,996 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:54:57,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-11-11 14:54:57,196 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:54:57,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:54:57,197 INFO L82 PathProgramCache]: Analyzing trace with hash -280243716, now seen corresponding path program 91 times [2020-11-11 14:54:57,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:54:57,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496840841] [2020-11-11 14:54:57,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:54:57,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:54:57,523 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:57,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496840841] [2020-11-11 14:54:57,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719542850] [2020-11-11 14:54:57,523 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:54:57,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:54:57,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:54:57,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:54:57,999 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:58,050 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:58,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:54:58,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:54:58,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890550218] [2020-11-11 14:54:58,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:54:58,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:54:58,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:54:58,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:54:58,052 INFO L87 Difference]: Start difference. First operand 4924 states and 13667 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:59,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:54:59,803 INFO L93 Difference]: Finished difference Result 7290 states and 18882 transitions. [2020-11-11 14:54:59,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 14:54:59,807 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-11 14:54:59,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:54:59,817 INFO L225 Difference]: With dead ends: 7290 [2020-11-11 14:54:59,818 INFO L226 Difference]: Without dead ends: 7138 [2020-11-11 14:54:59,818 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=501, Invalid=1391, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 14:54:59,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7138 states. [2020-11-11 14:54:59,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7138 to 4949. [2020-11-11 14:54:59,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4949 states, 4948 states have (on average 2.7732417138237673) internal successors, (13722), 4948 states have internal predecessors, (13722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:59,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4949 states to 4949 states and 13722 transitions. [2020-11-11 14:54:59,911 INFO L78 Accepts]: Start accepts. Automaton has 4949 states and 13722 transitions. Word has length 63 [2020-11-11 14:54:59,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:54:59,912 INFO L481 AbstractCegarLoop]: Abstraction has 4949 states and 13722 transitions. [2020-11-11 14:54:59,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:59,912 INFO L276 IsEmpty]: Start isEmpty. Operand 4949 states and 13722 transitions. [2020-11-11 14:54:59,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:54:59,917 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:54:59,917 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:55:00,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-11-11 14:55:00,118 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:55:00,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:55:00,118 INFO L82 PathProgramCache]: Analyzing trace with hash -608046206, now seen corresponding path program 18 times [2020-11-11 14:55:00,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:55:00,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923291692] [2020-11-11 14:55:00,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:55:00,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:55:00,492 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:00,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923291692] [2020-11-11 14:55:00,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225405565] [2020-11-11 14:55:00,492 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:55:00,554 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-11-11 14:55:00,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:55:00,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:55:00,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:55:01,117 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:01,183 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:01,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:55:01,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:55:01,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041815353] [2020-11-11 14:55:01,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:55:01,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:55:01,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:55:01,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:55:01,184 INFO L87 Difference]: Start difference. First operand 4949 states and 13722 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:03,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:55:03,131 INFO L93 Difference]: Finished difference Result 7392 states and 19268 transitions. [2020-11-11 14:55:03,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 14:55:03,134 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-11 14:55:03,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:55:03,145 INFO L225 Difference]: With dead ends: 7392 [2020-11-11 14:55:03,145 INFO L226 Difference]: Without dead ends: 6912 [2020-11-11 14:55:03,146 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=529, Invalid=1633, Unknown=0, NotChecked=0, Total=2162 [2020-11-11 14:55:03,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6912 states. [2020-11-11 14:55:03,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6912 to 4954. [2020-11-11 14:55:03,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4954 states, 4953 states have (on average 2.7694326670704625) internal successors, (13717), 4953 states have internal predecessors, (13717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:03,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4954 states to 4954 states and 13717 transitions. [2020-11-11 14:55:03,241 INFO L78 Accepts]: Start accepts. Automaton has 4954 states and 13717 transitions. Word has length 63 [2020-11-11 14:55:03,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:55:03,241 INFO L481 AbstractCegarLoop]: Abstraction has 4954 states and 13717 transitions. [2020-11-11 14:55:03,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:03,242 INFO L276 IsEmpty]: Start isEmpty. Operand 4954 states and 13717 transitions. [2020-11-11 14:55:03,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:55:03,248 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:55:03,248 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:55:03,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-11-11 14:55:03,449 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:55:03,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:55:03,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1788250652, now seen corresponding path program 92 times [2020-11-11 14:55:03,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:55:03,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326075837] [2020-11-11 14:55:03,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:55:03,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:55:03,796 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:03,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326075837] [2020-11-11 14:55:03,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509372004] [2020-11-11 14:55:03,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:55:03,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 14:55:03,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:55:03,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:55:03,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:55:04,359 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:04,361 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:04,364 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:04,442 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:04,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:55:04,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:55:04,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406412913] [2020-11-11 14:55:04,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:55:04,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:55:04,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:55:04,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:55:04,443 INFO L87 Difference]: Start difference. First operand 4954 states and 13717 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:06,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:55:06,499 INFO L93 Difference]: Finished difference Result 7024 states and 18332 transitions. [2020-11-11 14:55:06,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 14:55:06,503 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-11 14:55:06,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:55:06,515 INFO L225 Difference]: With dead ends: 7024 [2020-11-11 14:55:06,515 INFO L226 Difference]: Without dead ends: 6872 [2020-11-11 14:55:06,515 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=419, Invalid=1221, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 14:55:06,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6872 states. [2020-11-11 14:55:06,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6872 to 4954. [2020-11-11 14:55:06,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4954 states, 4953 states have (on average 2.7694326670704625) internal successors, (13717), 4953 states have internal predecessors, (13717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:06,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4954 states to 4954 states and 13717 transitions. [2020-11-11 14:55:06,612 INFO L78 Accepts]: Start accepts. Automaton has 4954 states and 13717 transitions. Word has length 63 [2020-11-11 14:55:06,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:55:06,612 INFO L481 AbstractCegarLoop]: Abstraction has 4954 states and 13717 transitions. [2020-11-11 14:55:06,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:06,613 INFO L276 IsEmpty]: Start isEmpty. Operand 4954 states and 13717 transitions. [2020-11-11 14:55:06,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:55:06,618 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:55:06,618 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:55:06,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:55:06,819 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:55:06,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:55:06,820 INFO L82 PathProgramCache]: Analyzing trace with hash -260210212, now seen corresponding path program 93 times [2020-11-11 14:55:06,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:55:06,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399407603] [2020-11-11 14:55:06,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:55:06,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:55:07,243 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:07,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399407603] [2020-11-11 14:55:07,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724797143] [2020-11-11 14:55:07,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:55:07,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-11 14:55:07,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:55:07,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:55:07,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:55:08,064 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:08,066 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:08,068 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:08,143 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:08,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:55:08,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:55:08,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567305706] [2020-11-11 14:55:08,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:55:08,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:55:08,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:55:08,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:55:08,145 INFO L87 Difference]: Start difference. First operand 4954 states and 13717 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:10,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:55:10,081 INFO L93 Difference]: Finished difference Result 7039 states and 18357 transitions. [2020-11-11 14:55:10,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 14:55:10,084 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-11 14:55:10,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:55:10,095 INFO L225 Difference]: With dead ends: 7039 [2020-11-11 14:55:10,095 INFO L226 Difference]: Without dead ends: 6887 [2020-11-11 14:55:10,096 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=445, Invalid=1277, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 14:55:10,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6887 states. [2020-11-11 14:55:10,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6887 to 4954. [2020-11-11 14:55:10,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4954 states, 4953 states have (on average 2.7694326670704625) internal successors, (13717), 4953 states have internal predecessors, (13717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:10,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4954 states to 4954 states and 13717 transitions. [2020-11-11 14:55:10,179 INFO L78 Accepts]: Start accepts. Automaton has 4954 states and 13717 transitions. Word has length 63 [2020-11-11 14:55:10,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:55:10,179 INFO L481 AbstractCegarLoop]: Abstraction has 4954 states and 13717 transitions. [2020-11-11 14:55:10,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:10,179 INFO L276 IsEmpty]: Start isEmpty. Operand 4954 states and 13717 transitions. [2020-11-11 14:55:10,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:55:10,184 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:55:10,184 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:55:10,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-11-11 14:55:10,385 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:55:10,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:55:10,386 INFO L82 PathProgramCache]: Analyzing trace with hash -2059172522, now seen corresponding path program 94 times [2020-11-11 14:55:10,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:55:10,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995819560] [2020-11-11 14:55:10,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:55:10,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:55:10,747 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:10,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995819560] [2020-11-11 14:55:10,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600810578] [2020-11-11 14:55:10,748 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:55:10,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 14:55:10,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:55:10,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:55:10,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:55:11,476 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:11,485 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:11,488 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:11,490 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:11,493 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:11,496 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:11,499 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:11,501 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:11,658 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:11,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:55:11,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:55:11,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838824435] [2020-11-11 14:55:11,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:55:11,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:55:11,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:55:11,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:55:11,659 INFO L87 Difference]: Start difference. First operand 4954 states and 13717 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:14,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:55:14,113 INFO L93 Difference]: Finished difference Result 6918 states and 18142 transitions. [2020-11-11 14:55:14,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 14:55:14,116 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-11 14:55:14,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:55:14,128 INFO L225 Difference]: With dead ends: 6918 [2020-11-11 14:55:14,128 INFO L226 Difference]: Without dead ends: 6766 [2020-11-11 14:55:14,128 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=440, Invalid=1282, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 14:55:14,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6766 states. [2020-11-11 14:55:14,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6766 to 4919. [2020-11-11 14:55:14,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4919 states, 4918 states have (on average 2.7734851565677103) internal successors, (13640), 4918 states have internal predecessors, (13640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:14,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4919 states to 4919 states and 13640 transitions. [2020-11-11 14:55:14,223 INFO L78 Accepts]: Start accepts. Automaton has 4919 states and 13640 transitions. Word has length 63 [2020-11-11 14:55:14,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:55:14,223 INFO L481 AbstractCegarLoop]: Abstraction has 4919 states and 13640 transitions. [2020-11-11 14:55:14,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:14,223 INFO L276 IsEmpty]: Start isEmpty. Operand 4919 states and 13640 transitions. [2020-11-11 14:55:14,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:55:14,229 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:55:14,229 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:55:14,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-11-11 14:55:14,430 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:55:14,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:55:14,430 INFO L82 PathProgramCache]: Analyzing trace with hash -923972330, now seen corresponding path program 95 times [2020-11-11 14:55:14,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:55:14,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987915489] [2020-11-11 14:55:14,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:55:14,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:55:14,843 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:14,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987915489] [2020-11-11 14:55:14,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588227551] [2020-11-11 14:55:14,843 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:55:14,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-11 14:55:14,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:55:14,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:55:14,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:55:15,637 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:15,699 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:15,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:55:15,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:55:15,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216330867] [2020-11-11 14:55:15,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:55:15,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:55:15,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:55:15,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:55:15,700 INFO L87 Difference]: Start difference. First operand 4919 states and 13640 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:17,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:55:17,551 INFO L93 Difference]: Finished difference Result 7143 states and 18573 transitions. [2020-11-11 14:55:17,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 14:55:17,555 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-11 14:55:17,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:55:17,567 INFO L225 Difference]: With dead ends: 7143 [2020-11-11 14:55:17,567 INFO L226 Difference]: Without dead ends: 6991 [2020-11-11 14:55:17,568 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=491, Invalid=1401, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 14:55:17,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6991 states. [2020-11-11 14:55:17,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6991 to 5054. [2020-11-11 14:55:17,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5054 states, 5053 states have (on average 2.7581634672471798) internal successors, (13937), 5053 states have internal predecessors, (13937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:17,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5054 states to 5054 states and 13937 transitions. [2020-11-11 14:55:17,663 INFO L78 Accepts]: Start accepts. Automaton has 5054 states and 13937 transitions. Word has length 63 [2020-11-11 14:55:17,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:55:17,663 INFO L481 AbstractCegarLoop]: Abstraction has 5054 states and 13937 transitions. [2020-11-11 14:55:17,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:17,663 INFO L276 IsEmpty]: Start isEmpty. Operand 5054 states and 13937 transitions. [2020-11-11 14:55:17,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:55:17,669 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:55:17,669 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:55:17,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:55:17,870 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:55:17,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:55:17,870 INFO L82 PathProgramCache]: Analyzing trace with hash 604068110, now seen corresponding path program 96 times [2020-11-11 14:55:17,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:55:17,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137816115] [2020-11-11 14:55:17,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:55:17,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:55:18,238 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:18,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137816115] [2020-11-11 14:55:18,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388411977] [2020-11-11 14:55:18,239 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:55:18,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-11 14:55:18,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:55:18,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:55:18,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:55:18,808 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:18,867 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:18,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:55:18,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:55:18,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814515471] [2020-11-11 14:55:18,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:55:18,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:55:18,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:55:18,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:55:18,868 INFO L87 Difference]: Start difference. First operand 5054 states and 13937 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:20,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:55:20,777 INFO L93 Difference]: Finished difference Result 7247 states and 18781 transitions. [2020-11-11 14:55:20,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 14:55:20,779 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-11 14:55:20,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:55:20,790 INFO L225 Difference]: With dead ends: 7247 [2020-11-11 14:55:20,790 INFO L226 Difference]: Without dead ends: 7095 [2020-11-11 14:55:20,791 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=456, Invalid=1350, Unknown=0, NotChecked=0, Total=1806 [2020-11-11 14:55:20,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7095 states. [2020-11-11 14:55:20,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7095 to 5064. [2020-11-11 14:55:20,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5064 states, 5063 states have (on average 2.757061031009283) internal successors, (13959), 5063 states have internal predecessors, (13959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:20,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5064 states to 5064 states and 13959 transitions. [2020-11-11 14:55:20,879 INFO L78 Accepts]: Start accepts. Automaton has 5064 states and 13959 transitions. Word has length 63 [2020-11-11 14:55:20,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:55:20,879 INFO L481 AbstractCegarLoop]: Abstraction has 5064 states and 13959 transitions. [2020-11-11 14:55:20,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:20,879 INFO L276 IsEmpty]: Start isEmpty. Operand 5064 states and 13959 transitions. [2020-11-11 14:55:20,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:55:20,884 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:55:20,884 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:55:21,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:55:21,085 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:55:21,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:55:21,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1194894200, now seen corresponding path program 97 times [2020-11-11 14:55:21,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:55:21,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135873792] [2020-11-11 14:55:21,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:55:21,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:55:21,536 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:21,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135873792] [2020-11-11 14:55:21,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572534835] [2020-11-11 14:55:21,536 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:55:21,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:55:21,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:55:21,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:55:22,442 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:22,445 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:22,447 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:22,538 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:22,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:55:22,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:55:22,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376487519] [2020-11-11 14:55:22,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:55:22,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:55:22,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:55:22,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:55:22,539 INFO L87 Difference]: Start difference. First operand 5064 states and 13959 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:25,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:55:25,075 INFO L93 Difference]: Finished difference Result 7376 states and 19044 transitions. [2020-11-11 14:55:25,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 14:55:25,077 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-11 14:55:25,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:55:25,087 INFO L225 Difference]: With dead ends: 7376 [2020-11-11 14:55:25,088 INFO L226 Difference]: Without dead ends: 7224 [2020-11-11 14:55:25,088 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=541, Invalid=1529, Unknown=0, NotChecked=0, Total=2070 [2020-11-11 14:55:25,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7224 states. [2020-11-11 14:55:25,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7224 to 5069. [2020-11-11 14:55:25,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5069 states, 5068 states have (on average 2.7565114443567484) internal successors, (13970), 5068 states have internal predecessors, (13970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:25,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5069 states to 5069 states and 13970 transitions. [2020-11-11 14:55:25,176 INFO L78 Accepts]: Start accepts. Automaton has 5069 states and 13970 transitions. Word has length 63 [2020-11-11 14:55:25,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:55:25,176 INFO L481 AbstractCegarLoop]: Abstraction has 5069 states and 13970 transitions. [2020-11-11 14:55:25,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:25,176 INFO L276 IsEmpty]: Start isEmpty. Operand 5069 states and 13970 transitions. [2020-11-11 14:55:25,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:55:25,181 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:55:25,181 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:55:25,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:55:25,392 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:55:25,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:55:25,392 INFO L82 PathProgramCache]: Analyzing trace with hash 210572516, now seen corresponding path program 98 times [2020-11-11 14:55:25,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:55:25,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598989710] [2020-11-11 14:55:25,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:55:25,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:55:25,820 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:25,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598989710] [2020-11-11 14:55:25,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161077755] [2020-11-11 14:55:25,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:55:25,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 14:55:25,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:55:25,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:55:25,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:55:26,400 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:26,455 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:26,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:55:26,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:55:26,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296918614] [2020-11-11 14:55:26,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:55:26,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:55:26,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:55:26,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:55:26,456 INFO L87 Difference]: Start difference. First operand 5069 states and 13970 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:28,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:55:28,775 INFO L93 Difference]: Finished difference Result 7490 states and 19274 transitions. [2020-11-11 14:55:28,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 14:55:28,777 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-11 14:55:28,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:55:28,789 INFO L225 Difference]: With dead ends: 7490 [2020-11-11 14:55:28,790 INFO L226 Difference]: Without dead ends: 7338 [2020-11-11 14:55:28,790 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=598, Invalid=1658, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 14:55:28,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7338 states. [2020-11-11 14:55:28,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7338 to 5094. [2020-11-11 14:55:28,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5094 states, 5093 states have (on average 2.75377969762419) internal successors, (14025), 5093 states have internal predecessors, (14025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:28,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5094 states to 5094 states and 14025 transitions. [2020-11-11 14:55:28,889 INFO L78 Accepts]: Start accepts. Automaton has 5094 states and 14025 transitions. Word has length 63 [2020-11-11 14:55:28,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:55:28,889 INFO L481 AbstractCegarLoop]: Abstraction has 5094 states and 14025 transitions. [2020-11-11 14:55:28,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:28,889 INFO L276 IsEmpty]: Start isEmpty. Operand 5094 states and 14025 transitions. [2020-11-11 14:55:28,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:55:28,895 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:55:28,895 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:55:29,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:55:29,096 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:55:29,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:55:29,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1738612956, now seen corresponding path program 99 times [2020-11-11 14:55:29,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:55:29,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755493597] [2020-11-11 14:55:29,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:55:29,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:55:29,577 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:29,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755493597] [2020-11-11 14:55:29,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421670870] [2020-11-11 14:55:29,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:55:29,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-11 14:55:29,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:55:29,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:55:29,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:55:30,244 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:30,308 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:30,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:55:30,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:55:30,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038701984] [2020-11-11 14:55:30,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:55:30,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:55:30,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:55:30,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:55:30,310 INFO L87 Difference]: Start difference. First operand 5094 states and 14025 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:32,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:55:32,771 INFO L93 Difference]: Finished difference Result 7515 states and 19329 transitions. [2020-11-11 14:55:32,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 14:55:32,774 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-11 14:55:32,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:55:32,786 INFO L225 Difference]: With dead ends: 7515 [2020-11-11 14:55:32,786 INFO L226 Difference]: Without dead ends: 7363 [2020-11-11 14:55:32,787 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=566, Invalid=1596, Unknown=0, NotChecked=0, Total=2162 [2020-11-11 14:55:32,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7363 states. [2020-11-11 14:55:32,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7363 to 5119. [2020-11-11 14:55:32,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5119 states, 5118 states have (on average 2.751074638530676) internal successors, (14080), 5118 states have internal predecessors, (14080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:32,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5119 states to 5119 states and 14080 transitions. [2020-11-11 14:55:32,890 INFO L78 Accepts]: Start accepts. Automaton has 5119 states and 14080 transitions. Word has length 63 [2020-11-11 14:55:32,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:55:32,890 INFO L481 AbstractCegarLoop]: Abstraction has 5119 states and 14080 transitions. [2020-11-11 14:55:32,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:32,891 INFO L276 IsEmpty]: Start isEmpty. Operand 5119 states and 14080 transitions. [2020-11-11 14:55:32,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:55:32,896 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:55:32,896 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:55:33,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-11-11 14:55:33,097 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:55:33,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:55:33,098 INFO L82 PathProgramCache]: Analyzing trace with hash -60349354, now seen corresponding path program 100 times [2020-11-11 14:55:33,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:55:33,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722289910] [2020-11-11 14:55:33,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:55:33,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:55:33,504 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:33,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722289910] [2020-11-11 14:55:33,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217668999] [2020-11-11 14:55:33,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:55:33,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 14:55:33,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:55:33,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:55:33,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:55:34,192 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:34,257 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:34,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:55:34,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:55:34,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434564475] [2020-11-11 14:55:34,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:55:34,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:55:34,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:55:34,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:55:34,259 INFO L87 Difference]: Start difference. First operand 5119 states and 14080 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:36,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:55:36,895 INFO L93 Difference]: Finished difference Result 7605 states and 19519 transitions. [2020-11-11 14:55:36,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-11 14:55:36,897 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-11 14:55:36,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:55:36,910 INFO L225 Difference]: With dead ends: 7605 [2020-11-11 14:55:36,910 INFO L226 Difference]: Without dead ends: 7453 [2020-11-11 14:55:36,910 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=629, Invalid=1723, Unknown=0, NotChecked=0, Total=2352 [2020-11-11 14:55:36,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7453 states. [2020-11-11 14:55:36,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7453 to 5084. [2020-11-11 14:55:36,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5084 states, 5083 states have (on average 2.7548691717489673) internal successors, (14003), 5083 states have internal predecessors, (14003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:37,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5084 states to 5084 states and 14003 transitions. [2020-11-11 14:55:37,011 INFO L78 Accepts]: Start accepts. Automaton has 5084 states and 14003 transitions. Word has length 63 [2020-11-11 14:55:37,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:55:37,011 INFO L481 AbstractCegarLoop]: Abstraction has 5084 states and 14003 transitions. [2020-11-11 14:55:37,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:37,011 INFO L276 IsEmpty]: Start isEmpty. Operand 5084 states and 14003 transitions. [2020-11-11 14:55:37,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:55:37,063 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:55:37,063 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:55:37,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-11-11 14:55:37,269 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:55:37,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:55:37,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1068253696, now seen corresponding path program 101 times [2020-11-11 14:55:37,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:55:37,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663464321] [2020-11-11 14:55:37,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:55:37,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:55:37,697 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:37,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663464321] [2020-11-11 14:55:37,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595527332] [2020-11-11 14:55:37,698 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:55:37,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-11 14:55:37,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:55:37,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:55:37,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:55:38,500 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:38,509 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:38,512 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:38,515 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:38,519 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:38,522 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:38,526 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:38,529 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:38,686 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:38,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:55:38,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:55:38,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381732180] [2020-11-11 14:55:38,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:55:38,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:55:38,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:55:38,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:55:38,688 INFO L87 Difference]: Start difference. First operand 5084 states and 14003 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:41,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:55:41,971 INFO L93 Difference]: Finished difference Result 7574 states and 19454 transitions. [2020-11-11 14:55:41,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 14:55:41,975 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-11 14:55:41,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:55:41,989 INFO L225 Difference]: With dead ends: 7574 [2020-11-11 14:55:41,990 INFO L226 Difference]: Without dead ends: 7422 [2020-11-11 14:55:41,990 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=572, Invalid=1590, Unknown=0, NotChecked=0, Total=2162 [2020-11-11 14:55:42,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7422 states. [2020-11-11 14:55:42,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7422 to 5134. [2020-11-11 14:55:42,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5134 states, 5133 states have (on average 2.7494642509253846) internal successors, (14113), 5133 states have internal predecessors, (14113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:42,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5134 states to 5134 states and 14113 transitions. [2020-11-11 14:55:42,107 INFO L78 Accepts]: Start accepts. Automaton has 5134 states and 14113 transitions. Word has length 63 [2020-11-11 14:55:42,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:55:42,107 INFO L481 AbstractCegarLoop]: Abstraction has 5134 states and 14113 transitions. [2020-11-11 14:55:42,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:42,107 INFO L276 IsEmpty]: Start isEmpty. Operand 5134 states and 14113 transitions. [2020-11-11 14:55:42,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:55:42,114 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:55:42,114 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:55:42,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-11-11 14:55:42,315 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:55:42,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:55:42,316 INFO L82 PathProgramCache]: Analyzing trace with hash -730708614, now seen corresponding path program 102 times [2020-11-11 14:55:42,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:55:42,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958621618] [2020-11-11 14:55:42,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:55:42,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:55:42,760 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:42,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958621618] [2020-11-11 14:55:42,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061967616] [2020-11-11 14:55:42,761 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:55:42,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-11 14:55:42,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:55:42,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:55:42,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:55:43,649 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:43,653 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:43,655 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:43,770 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:43,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:55:43,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:55:43,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156152545] [2020-11-11 14:55:43,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:55:43,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:55:43,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:55:43,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:55:43,771 INFO L87 Difference]: Start difference. First operand 5134 states and 14113 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:46,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:55:46,817 INFO L93 Difference]: Finished difference Result 7634 states and 19594 transitions. [2020-11-11 14:55:46,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 14:55:46,818 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-11 14:55:46,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:55:46,828 INFO L225 Difference]: With dead ends: 7634 [2020-11-11 14:55:46,828 INFO L226 Difference]: Without dead ends: 7482 [2020-11-11 14:55:46,828 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=596, Invalid=1660, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 14:55:46,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7482 states. [2020-11-11 14:55:46,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7482 to 5049. [2020-11-11 14:55:46,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5049 states, 5048 states have (on average 2.758716323296355) internal successors, (13926), 5048 states have internal predecessors, (13926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:46,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5049 states to 5049 states and 13926 transitions. [2020-11-11 14:55:46,917 INFO L78 Accepts]: Start accepts. Automaton has 5049 states and 13926 transitions. Word has length 63 [2020-11-11 14:55:46,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:55:46,917 INFO L481 AbstractCegarLoop]: Abstraction has 5049 states and 13926 transitions. [2020-11-11 14:55:46,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:46,917 INFO L276 IsEmpty]: Start isEmpty. Operand 5049 states and 13926 transitions. [2020-11-11 14:55:46,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:55:46,923 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:55:46,923 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:55:47,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:55:47,126 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:55:47,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:55:47,127 INFO L82 PathProgramCache]: Analyzing trace with hash 159449878, now seen corresponding path program 19 times [2020-11-11 14:55:47,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:55:47,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732773944] [2020-11-11 14:55:47,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:55:47,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:55:47,487 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:47,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732773944] [2020-11-11 14:55:47,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075869457] [2020-11-11 14:55:47,488 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:55:47,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:55:47,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:55:47,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:55:48,140 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:48,213 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:48,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:55:48,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:55:48,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883143920] [2020-11-11 14:55:48,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:55:48,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:55:48,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:55:48,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:55:48,215 INFO L87 Difference]: Start difference. First operand 5049 states and 13926 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:50,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:55:50,828 INFO L93 Difference]: Finished difference Result 7035 states and 18377 transitions. [2020-11-11 14:55:50,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 14:55:50,831 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-11 14:55:50,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:55:50,844 INFO L225 Difference]: With dead ends: 7035 [2020-11-11 14:55:50,844 INFO L226 Difference]: Without dead ends: 6883 [2020-11-11 14:55:50,845 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=524, Invalid=1456, Unknown=0, NotChecked=0, Total=1980 [2020-11-11 14:55:50,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6883 states. [2020-11-11 14:55:50,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6883 to 5008. [2020-11-11 14:55:50,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5008 states, 5007 states have (on average 2.762332734172159) internal successors, (13831), 5007 states have internal predecessors, (13831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:50,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5008 states to 5008 states and 13831 transitions. [2020-11-11 14:55:50,949 INFO L78 Accepts]: Start accepts. Automaton has 5008 states and 13831 transitions. Word has length 63 [2020-11-11 14:55:50,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:55:50,949 INFO L481 AbstractCegarLoop]: Abstraction has 5008 states and 13831 transitions. [2020-11-11 14:55:50,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:50,949 INFO L276 IsEmpty]: Start isEmpty. Operand 5008 states and 13831 transitions. [2020-11-11 14:55:50,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:55:50,956 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:55:50,956 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:55:51,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-11-11 14:55:51,162 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:55:51,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:55:51,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1688052484, now seen corresponding path program 103 times [2020-11-11 14:55:51,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:55:51,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209583581] [2020-11-11 14:55:51,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:55:51,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:55:51,600 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:51,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209583581] [2020-11-11 14:55:51,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103398160] [2020-11-11 14:55:51,601 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:55:51,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:55:51,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:55:51,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:55:52,462 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:52,465 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:52,467 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:52,566 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:52,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:55:52,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:55:52,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445133414] [2020-11-11 14:55:52,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:55:52,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:55:52,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:55:52,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:55:52,568 INFO L87 Difference]: Start difference. First operand 5008 states and 13831 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:53,855 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-11-11 14:55:55,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:55:55,603 INFO L93 Difference]: Finished difference Result 7126 states and 18534 transitions. [2020-11-11 14:55:55,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 14:55:55,607 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-11 14:55:55,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:55:55,618 INFO L225 Difference]: With dead ends: 7126 [2020-11-11 14:55:55,618 INFO L226 Difference]: Without dead ends: 6974 [2020-11-11 14:55:55,619 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=509, Invalid=1471, Unknown=0, NotChecked=0, Total=1980 [2020-11-11 14:55:55,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6974 states. [2020-11-11 14:55:55,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6974 to 4903. [2020-11-11 14:55:55,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4903 states, 4902 states have (on average 2.77437780497756) internal successors, (13600), 4902 states have internal predecessors, (13600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:55,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4903 states to 4903 states and 13600 transitions. [2020-11-11 14:55:55,712 INFO L78 Accepts]: Start accepts. Automaton has 4903 states and 13600 transitions. Word has length 63 [2020-11-11 14:55:55,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:55:55,713 INFO L481 AbstractCegarLoop]: Abstraction has 4903 states and 13600 transitions. [2020-11-11 14:55:55,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:55,713 INFO L276 IsEmpty]: Start isEmpty. Operand 4903 states and 13600 transitions. [2020-11-11 14:55:55,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:55:55,719 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:55:55,719 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:55:55,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:55:55,920 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:55:55,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:55:55,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1073350684, now seen corresponding path program 104 times [2020-11-11 14:55:55,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:55:55,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411256520] [2020-11-11 14:55:55,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:55:55,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:55:56,364 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:56,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411256520] [2020-11-11 14:55:56,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346398215] [2020-11-11 14:55:56,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:55:56,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 14:55:56,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:55:56,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:55:56,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:55:57,212 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:57,241 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:57,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:55:57,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:55:57,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273454039] [2020-11-11 14:55:57,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:55:57,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:55:57,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:55:57,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:55:57,243 INFO L87 Difference]: Start difference. First operand 4903 states and 13600 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:56:03,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:56:03,521 INFO L93 Difference]: Finished difference Result 7912 states and 20180 transitions. [2020-11-11 14:56:03,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 14:56:03,523 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-11 14:56:03,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:56:03,534 INFO L225 Difference]: With dead ends: 7912 [2020-11-11 14:56:03,534 INFO L226 Difference]: Without dead ends: 7672 [2020-11-11 14:56:03,535 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=411, Invalid=1149, Unknown=0, NotChecked=0, Total=1560 [2020-11-11 14:56:03,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7672 states. [2020-11-11 14:56:03,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7672 to 4978. [2020-11-11 14:56:03,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4978 states, 4977 states have (on average 2.765722322684348) internal successors, (13765), 4977 states have internal predecessors, (13765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:56:03,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4978 states to 4978 states and 13765 transitions. [2020-11-11 14:56:03,624 INFO L78 Accepts]: Start accepts. Automaton has 4978 states and 13765 transitions. Word has length 63 [2020-11-11 14:56:03,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:56:03,624 INFO L481 AbstractCegarLoop]: Abstraction has 4978 states and 13765 transitions. [2020-11-11 14:56:03,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:56:03,624 INFO L276 IsEmpty]: Start isEmpty. Operand 4978 states and 13765 transitions. [2020-11-11 14:56:03,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:56:03,630 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:56:03,630 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:56:03,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-11-11 14:56:03,844 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:56:03,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:56:03,844 INFO L82 PathProgramCache]: Analyzing trace with hash 675234806, now seen corresponding path program 105 times [2020-11-11 14:56:03,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:56:03,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863614760] [2020-11-11 14:56:03,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:56:03,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:56:04,331 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:04,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863614760] [2020-11-11 14:56:04,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141366694] [2020-11-11 14:56:04,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:56:04,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-11 14:56:04,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:56:04,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:56:04,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:56:05,027 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:05,131 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:05,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:56:05,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:56:05,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160643491] [2020-11-11 14:56:05,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:56:05,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:56:05,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:56:05,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:56:05,133 INFO L87 Difference]: Start difference. First operand 4978 states and 13765 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:56:07,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:56:07,038 INFO L93 Difference]: Finished difference Result 7664 states and 19620 transitions. [2020-11-11 14:56:07,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-11 14:56:07,041 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-11 14:56:07,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:56:07,050 INFO L225 Difference]: With dead ends: 7664 [2020-11-11 14:56:07,050 INFO L226 Difference]: Without dead ends: 7512 [2020-11-11 14:56:07,051 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=382, Invalid=1024, Unknown=0, NotChecked=0, Total=1406 [2020-11-11 14:56:07,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7512 states. [2020-11-11 14:56:07,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7512 to 5003. [2020-11-11 14:56:07,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5003 states, 5002 states have (on average 2.762894842063175) internal successors, (13820), 5002 states have internal predecessors, (13820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:56:07,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5003 states to 5003 states and 13820 transitions. [2020-11-11 14:56:07,137 INFO L78 Accepts]: Start accepts. Automaton has 5003 states and 13820 transitions. Word has length 63 [2020-11-11 14:56:07,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:56:07,137 INFO L481 AbstractCegarLoop]: Abstraction has 5003 states and 13820 transitions. [2020-11-11 14:56:07,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:56:07,137 INFO L276 IsEmpty]: Start isEmpty. Operand 5003 states and 13820 transitions. [2020-11-11 14:56:07,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:56:07,142 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:56:07,142 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:56:07,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:56:07,343 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:56:07,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:56:07,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1755639384, now seen corresponding path program 106 times [2020-11-11 14:56:07,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:56:07,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692304128] [2020-11-11 14:56:07,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:56:07,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:56:07,706 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:07,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692304128] [2020-11-11 14:56:07,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405367419] [2020-11-11 14:56:07,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:56:07,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 14:56:07,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:56:07,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:56:07,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:56:08,516 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:08,519 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:08,521 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:08,615 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:08,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:56:08,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:56:08,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620531550] [2020-11-11 14:56:08,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:56:08,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:56:08,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:56:08,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:56:08,617 INFO L87 Difference]: Start difference. First operand 5003 states and 13820 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:56:11,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:56:11,100 INFO L93 Difference]: Finished difference Result 7905 states and 20107 transitions. [2020-11-11 14:56:11,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 14:56:11,103 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-11 14:56:11,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:56:11,116 INFO L225 Difference]: With dead ends: 7905 [2020-11-11 14:56:11,116 INFO L226 Difference]: Without dead ends: 7753 [2020-11-11 14:56:11,117 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=488, Invalid=1404, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 14:56:11,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7753 states. [2020-11-11 14:56:11,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7753 to 5028. [2020-11-11 14:56:11,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5028 states, 5027 states have (on average 2.760095484384325) internal successors, (13875), 5027 states have internal predecessors, (13875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:56:11,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5028 states to 5028 states and 13875 transitions. [2020-11-11 14:56:11,222 INFO L78 Accepts]: Start accepts. Automaton has 5028 states and 13875 transitions. Word has length 63 [2020-11-11 14:56:11,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:56:11,222 INFO L481 AbstractCegarLoop]: Abstraction has 5028 states and 13875 transitions. [2020-11-11 14:56:11,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:56:11,222 INFO L276 IsEmpty]: Start isEmpty. Operand 5028 states and 13875 transitions. [2020-11-11 14:56:11,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:56:11,228 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:56:11,228 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:56:11,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2020-11-11 14:56:11,433 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:56:11,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:56:11,434 INFO L82 PathProgramCache]: Analyzing trace with hash -227598944, now seen corresponding path program 107 times [2020-11-11 14:56:11,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:56:11,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414948379] [2020-11-11 14:56:11,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:56:11,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:56:11,877 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:11,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414948379] [2020-11-11 14:56:11,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486546744] [2020-11-11 14:56:11,877 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:56:11,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-11 14:56:11,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:56:11,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:56:11,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:56:12,813 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:12,816 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:12,818 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:12,928 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:12,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:56:12,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:56:12,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44323606] [2020-11-11 14:56:12,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:56:12,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:56:12,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:56:12,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:56:12,930 INFO L87 Difference]: Start difference. First operand 5028 states and 13875 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:56:14,341 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2020-11-11 14:56:15,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:56:15,779 INFO L93 Difference]: Finished difference Result 7960 states and 20212 transitions. [2020-11-11 14:56:15,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 14:56:15,783 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-11 14:56:15,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:56:15,795 INFO L225 Difference]: With dead ends: 7960 [2020-11-11 14:56:15,795 INFO L226 Difference]: Without dead ends: 7808 [2020-11-11 14:56:15,795 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=484, Invalid=1322, Unknown=0, NotChecked=0, Total=1806 [2020-11-11 14:56:15,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7808 states. [2020-11-11 14:56:15,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7808 to 5028. [2020-11-11 14:56:15,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5028 states, 5027 states have (on average 2.760095484384325) internal successors, (13875), 5027 states have internal predecessors, (13875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:56:15,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5028 states to 5028 states and 13875 transitions. [2020-11-11 14:56:15,893 INFO L78 Accepts]: Start accepts. Automaton has 5028 states and 13875 transitions. Word has length 63 [2020-11-11 14:56:15,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:56:15,893 INFO L481 AbstractCegarLoop]: Abstraction has 5028 states and 13875 transitions. [2020-11-11 14:56:15,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:56:15,893 INFO L276 IsEmpty]: Start isEmpty. Operand 5028 states and 13875 transitions. [2020-11-11 14:56:15,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:56:15,899 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:56:15,899 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:56:16,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:56:16,100 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:56:16,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:56:16,100 INFO L82 PathProgramCache]: Analyzing trace with hash -2026561254, now seen corresponding path program 108 times [2020-11-11 14:56:16,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:56:16,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757887805] [2020-11-11 14:56:16,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:56:16,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:56:16,560 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:16,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757887805] [2020-11-11 14:56:16,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198573802] [2020-11-11 14:56:16,561 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:56:16,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-11 14:56:16,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:56:16,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:56:16,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:56:17,417 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:17,420 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:17,422 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:17,424 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:17,428 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:17,430 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:17,433 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:17,435 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:17,591 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:17,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:56:17,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:56:17,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832668746] [2020-11-11 14:56:17,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:56:17,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:56:17,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:56:17,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:56:17,593 INFO L87 Difference]: Start difference. First operand 5028 states and 13875 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:56:20,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:56:20,812 INFO L93 Difference]: Finished difference Result 7780 states and 19872 transitions. [2020-11-11 14:56:20,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 14:56:20,815 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-11 14:56:20,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:56:20,832 INFO L225 Difference]: With dead ends: 7780 [2020-11-11 14:56:20,832 INFO L226 Difference]: Without dead ends: 7628 [2020-11-11 14:56:20,833 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2020-11-11 14:56:20,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7628 states. [2020-11-11 14:56:20,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7628 to 5078. [2020-11-11 14:56:20,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5078 states, 5077 states have (on average 2.7545794760685443) internal successors, (13985), 5077 states have internal predecessors, (13985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:56:20,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5078 states to 5078 states and 13985 transitions. [2020-11-11 14:56:20,955 INFO L78 Accepts]: Start accepts. Automaton has 5078 states and 13985 transitions. Word has length 63 [2020-11-11 14:56:20,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:56:20,956 INFO L481 AbstractCegarLoop]: Abstraction has 5078 states and 13985 transitions. [2020-11-11 14:56:20,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:56:20,956 INFO L276 IsEmpty]: Start isEmpty. Operand 5078 states and 13985 transitions. [2020-11-11 14:56:20,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:56:20,962 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:56:20,962 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:56:21,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-11-11 14:56:21,167 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:56:21,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:56:21,167 INFO L82 PathProgramCache]: Analyzing trace with hash 874720782, now seen corresponding path program 109 times [2020-11-11 14:56:21,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:56:21,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286760407] [2020-11-11 14:56:21,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:56:21,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:56:21,611 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:21,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286760407] [2020-11-11 14:56:21,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196862311] [2020-11-11 14:56:21,612 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:56:21,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:56:21,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:56:21,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:56:22,446 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:22,449 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:22,451 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:22,454 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:22,457 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:22,465 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:22,468 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:22,472 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:22,604 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:22,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:56:22,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:56:22,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37054627] [2020-11-11 14:56:22,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:56:22,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:56:22,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:56:22,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:56:22,606 INFO L87 Difference]: Start difference. First operand 5078 states and 13985 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:56:25,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:56:25,175 INFO L93 Difference]: Finished difference Result 7699 states and 19705 transitions. [2020-11-11 14:56:25,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-11 14:56:25,177 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-11 14:56:25,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:56:25,188 INFO L225 Difference]: With dead ends: 7699 [2020-11-11 14:56:25,188 INFO L226 Difference]: Without dead ends: 7547 [2020-11-11 14:56:25,188 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 14:56:25,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7547 states. [2020-11-11 14:56:25,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7547 to 5053. [2020-11-11 14:56:25,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5053 states, 5052 states have (on average 2.7573238321456848) internal successors, (13930), 5052 states have internal predecessors, (13930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:56:25,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5053 states to 5053 states and 13930 transitions. [2020-11-11 14:56:25,279 INFO L78 Accepts]: Start accepts. Automaton has 5053 states and 13930 transitions. Word has length 63 [2020-11-11 14:56:25,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:56:25,279 INFO L481 AbstractCegarLoop]: Abstraction has 5053 states and 13930 transitions. [2020-11-11 14:56:25,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:56:25,279 INFO L276 IsEmpty]: Start isEmpty. Operand 5053 states and 13930 transitions. [2020-11-11 14:56:25,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:56:25,284 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:56:25,284 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:56:25,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-11-11 14:56:25,485 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:56:25,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:56:25,486 INFO L82 PathProgramCache]: Analyzing trace with hash -14803044, now seen corresponding path program 110 times [2020-11-11 14:56:25,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:56:25,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372596500] [2020-11-11 14:56:25,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:56:25,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:56:25,851 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:25,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372596500] [2020-11-11 14:56:25,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674936125] [2020-11-11 14:56:25,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:56:25,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 14:56:25,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:56:25,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:56:25,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:56:26,522 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:26,602 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:26,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:56:26,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:56:26,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121038669] [2020-11-11 14:56:26,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:56:26,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:56:26,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:56:26,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:56:26,604 INFO L87 Difference]: Start difference. First operand 5053 states and 13930 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:56:29,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:56:29,675 INFO L93 Difference]: Finished difference Result 8031 states and 20349 transitions. [2020-11-11 14:56:29,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-11 14:56:29,679 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-11 14:56:29,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:56:29,693 INFO L225 Difference]: With dead ends: 8031 [2020-11-11 14:56:29,693 INFO L226 Difference]: Without dead ends: 7879 [2020-11-11 14:56:29,694 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=619, Invalid=1931, Unknown=0, NotChecked=0, Total=2550 [2020-11-11 14:56:29,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7879 states. [2020-11-11 14:56:29,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7879 to 5103. [2020-11-11 14:56:29,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5103 states, 5102 states have (on average 2.751862014896119) internal successors, (14040), 5102 states have internal predecessors, (14040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:56:29,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5103 states to 5103 states and 14040 transitions. [2020-11-11 14:56:29,801 INFO L78 Accepts]: Start accepts. Automaton has 5103 states and 14040 transitions. Word has length 63 [2020-11-11 14:56:29,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:56:29,802 INFO L481 AbstractCegarLoop]: Abstraction has 5103 states and 14040 transitions. [2020-11-11 14:56:29,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:56:29,802 INFO L276 IsEmpty]: Start isEmpty. Operand 5103 states and 14040 transitions. [2020-11-11 14:56:29,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:56:29,808 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:56:29,808 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:56:30,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-11-11 14:56:30,009 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:56:30,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:56:30,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1513237396, now seen corresponding path program 111 times [2020-11-11 14:56:30,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:56:30,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582537105] [2020-11-11 14:56:30,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:56:30,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:56:30,484 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:30,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582537105] [2020-11-11 14:56:30,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931558222] [2020-11-11 14:56:30,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:56:30,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-11 14:56:30,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:56:30,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:56:30,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:56:31,217 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:31,296 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:31,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:56:31,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:56:31,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519932493] [2020-11-11 14:56:31,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:56:31,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:56:31,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:56:31,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:56:31,297 INFO L87 Difference]: Start difference. First operand 5103 states and 14040 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:56:34,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:56:34,362 INFO L93 Difference]: Finished difference Result 8255 states and 20797 transitions. [2020-11-11 14:56:34,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-11 14:56:34,366 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-11 14:56:34,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:56:34,380 INFO L225 Difference]: With dead ends: 8255 [2020-11-11 14:56:34,380 INFO L226 Difference]: Without dead ends: 8103 [2020-11-11 14:56:34,380 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=631, Invalid=1819, Unknown=0, NotChecked=0, Total=2450 [2020-11-11 14:56:34,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8103 states. [2020-11-11 14:56:34,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8103 to 5128. [2020-11-11 14:56:34,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5128 states, 5127 states have (on average 2.7491710551979716) internal successors, (14095), 5127 states have internal predecessors, (14095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:56:34,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5128 states to 5128 states and 14095 transitions. [2020-11-11 14:56:34,488 INFO L78 Accepts]: Start accepts. Automaton has 5128 states and 14095 transitions. Word has length 63 [2020-11-11 14:56:34,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:56:34,488 INFO L481 AbstractCegarLoop]: Abstraction has 5128 states and 14095 transitions. [2020-11-11 14:56:34,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:56:34,489 INFO L276 IsEmpty]: Start isEmpty. Operand 5128 states and 14095 transitions. [2020-11-11 14:56:34,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:56:34,494 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:56:34,495 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:56:34,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:56:34,695 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:56:34,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:56:34,696 INFO L82 PathProgramCache]: Analyzing trace with hash -285724914, now seen corresponding path program 112 times [2020-11-11 14:56:34,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:56:34,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889780508] [2020-11-11 14:56:34,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:56:34,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:56:35,098 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:35,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889780508] [2020-11-11 14:56:35,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22249148] [2020-11-11 14:56:35,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:56:35,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 14:56:35,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:56:35,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:56:35,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:56:35,679 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:35,689 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:35,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:56:35,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:56:35,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786147989] [2020-11-11 14:56:35,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:56:35,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:56:35,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:56:35,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:56:35,691 INFO L87 Difference]: Start difference. First operand 5128 states and 14095 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:56:38,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:56:38,131 INFO L93 Difference]: Finished difference Result 8085 states and 20487 transitions. [2020-11-11 14:56:38,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-11 14:56:38,135 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-11 14:56:38,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:56:38,145 INFO L225 Difference]: With dead ends: 8085 [2020-11-11 14:56:38,145 INFO L226 Difference]: Without dead ends: 7933 [2020-11-11 14:56:38,146 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=582, Invalid=1674, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 14:56:38,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7933 states. [2020-11-11 14:56:38,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7933 to 5153. [2020-11-11 14:56:38,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5153 states, 5152 states have (on average 2.746506211180124) internal successors, (14150), 5152 states have internal predecessors, (14150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:56:38,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5153 states to 5153 states and 14150 transitions. [2020-11-11 14:56:38,240 INFO L78 Accepts]: Start accepts. Automaton has 5153 states and 14150 transitions. Word has length 63 [2020-11-11 14:56:38,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:56:38,240 INFO L481 AbstractCegarLoop]: Abstraction has 5153 states and 14150 transitions. [2020-11-11 14:56:38,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:56:38,240 INFO L276 IsEmpty]: Start isEmpty. Operand 5153 states and 14150 transitions. [2020-11-11 14:56:38,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:56:38,246 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:56:38,246 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:56:38,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:56:38,447 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:56:38,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:56:38,447 INFO L82 PathProgramCache]: Analyzing trace with hash -613527404, now seen corresponding path program 20 times [2020-11-11 14:56:38,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:56:38,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198499423] [2020-11-11 14:56:38,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:56:38,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:56:38,914 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:38,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198499423] [2020-11-11 14:56:38,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693456273] [2020-11-11 14:56:38,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:56:38,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 14:56:38,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:56:38,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:56:38,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:56:39,696 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:39,790 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:39,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:56:39,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:56:39,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496221724] [2020-11-11 14:56:39,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:56:39,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:56:39,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:56:39,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:56:39,792 INFO L87 Difference]: Start difference. First operand 5153 states and 14150 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:56:42,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:56:42,907 INFO L93 Difference]: Finished difference Result 8208 states and 20900 transitions. [2020-11-11 14:56:42,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-11 14:56:42,911 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-11 14:56:42,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:56:42,924 INFO L225 Difference]: With dead ends: 8208 [2020-11-11 14:56:42,925 INFO L226 Difference]: Without dead ends: 7728 [2020-11-11 14:56:42,925 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=587, Invalid=1963, Unknown=0, NotChecked=0, Total=2550 [2020-11-11 14:56:42,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7728 states. [2020-11-11 14:56:43,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7728 to 5128. [2020-11-11 14:56:43,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5128 states, 5127 states have (on average 2.7491710551979716) internal successors, (14095), 5127 states have internal predecessors, (14095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:56:43,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5128 states to 5128 states and 14095 transitions. [2020-11-11 14:56:43,034 INFO L78 Accepts]: Start accepts. Automaton has 5128 states and 14095 transitions. Word has length 63 [2020-11-11 14:56:43,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:56:43,035 INFO L481 AbstractCegarLoop]: Abstraction has 5128 states and 14095 transitions. [2020-11-11 14:56:43,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:56:43,035 INFO L276 IsEmpty]: Start isEmpty. Operand 5128 states and 14095 transitions. [2020-11-11 14:56:43,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:56:43,041 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:56:43,041 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:56:43,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-11-11 14:56:43,242 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:56:43,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:56:43,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1793731850, now seen corresponding path program 113 times [2020-11-11 14:56:43,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:56:43,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85991351] [2020-11-11 14:56:43,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:56:43,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:56:43,671 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:43,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85991351] [2020-11-11 14:56:43,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979979537] [2020-11-11 14:56:43,672 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:56:43,730 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-11 14:56:43,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:56:43,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:56:43,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:56:44,381 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:44,384 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:44,390 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:44,490 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:44,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:56:44,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:56:44,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567674063] [2020-11-11 14:56:44,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:56:44,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:56:44,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:56:44,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:56:44,491 INFO L87 Difference]: Start difference. First operand 5128 states and 14095 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:56:47,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:56:47,486 INFO L93 Difference]: Finished difference Result 7741 states and 19799 transitions. [2020-11-11 14:56:47,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 14:56:47,491 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-11 14:56:47,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:56:47,502 INFO L225 Difference]: With dead ends: 7741 [2020-11-11 14:56:47,502 INFO L226 Difference]: Without dead ends: 7589 [2020-11-11 14:56:47,503 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=508, Invalid=1562, Unknown=0, NotChecked=0, Total=2070 [2020-11-11 14:56:47,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7589 states. [2020-11-11 14:56:47,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7589 to 5128. [2020-11-11 14:56:47,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5128 states, 5127 states have (on average 2.7491710551979716) internal successors, (14095), 5127 states have internal predecessors, (14095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:56:47,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5128 states to 5128 states and 14095 transitions. [2020-11-11 14:56:47,598 INFO L78 Accepts]: Start accepts. Automaton has 5128 states and 14095 transitions. Word has length 63 [2020-11-11 14:56:47,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:56:47,598 INFO L481 AbstractCegarLoop]: Abstraction has 5128 states and 14095 transitions. [2020-11-11 14:56:47,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:56:47,598 INFO L276 IsEmpty]: Start isEmpty. Operand 5128 states and 14095 transitions. [2020-11-11 14:56:47,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:56:47,603 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:56:47,604 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 14:56:47,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-11-11 14:56:47,804 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:56:47,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:56:47,805 INFO L82 PathProgramCache]: Analyzing trace with hash -265691410, now seen corresponding path program 114 times [2020-11-11 14:56:47,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:56:47,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757115670] [2020-11-11 14:56:47,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:56:47,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:56:48,187 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:48,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757115670] [2020-11-11 14:56:48,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530271394] [2020-11-11 14:56:48,189 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:56:48,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-11 14:56:48,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:56:48,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:56:48,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:56:49,049 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:49,051 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:49,054 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:49,164 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:49,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:56:49,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:56:49,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839930695] [2020-11-11 14:56:49,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:56:49,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:56:49,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:56:49,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:56:49,166 INFO L87 Difference]: Start difference. First operand 5128 states and 14095 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2020-11-11 14:56:49,912 WARN L210 SmtUtils]: Removed 5 from assertion stack [2020-11-11 14:56:49,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-11 14:56:50,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:56:50,114 WARN L546 AbstractCegarLoop]: Verification canceled [2020-11-11 14:56:50,120 WARN L250 ceAbstractionStarter]: Timeout [2020-11-11 14:56:50,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.11 02:56:50 BasicIcfg [2020-11-11 14:56:50,120 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-11 14:56:50,121 INFO L168 Benchmark]: Toolchain (without parser) took 838290.64 ms. Allocated memory was 308.3 MB in the beginning and 1.0 GB in the end (delta: 734.0 MB). Free memory was 282.2 MB in the beginning and 999.1 MB in the end (delta: -716.9 MB). Peak memory consumption was 624.5 MB. Max. memory is 16.0 GB. [2020-11-11 14:56:50,122 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 308.3 MB. Free memory was 279.6 MB in the beginning and 279.6 MB in the end (delta: 76.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2020-11-11 14:56:50,122 INFO L168 Benchmark]: CACSL2BoogieTranslator took 709.02 ms. Allocated memory is still 308.3 MB. Free memory was 281.5 MB in the beginning and 283.3 MB in the end (delta: -1.8 MB). Peak memory consumption was 30.1 MB. Max. memory is 16.0 GB. [2020-11-11 14:56:50,122 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.06 ms. Allocated memory is still 308.3 MB. Free memory was 283.3 MB in the beginning and 281.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2020-11-11 14:56:50,122 INFO L168 Benchmark]: Boogie Preprocessor took 30.00 ms. Allocated memory is still 308.3 MB. Free memory was 281.8 MB in the beginning and 280.8 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2020-11-11 14:56:50,123 INFO L168 Benchmark]: RCFGBuilder took 457.95 ms. Allocated memory is still 308.3 MB. Free memory was 280.8 MB in the beginning and 259.8 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. [2020-11-11 14:56:50,123 INFO L168 Benchmark]: TraceAbstraction took 837031.00 ms. Allocated memory was 308.3 MB in the beginning and 1.0 GB in the end (delta: 734.0 MB). Free memory was 258.7 MB in the beginning and 999.1 MB in the end (delta: -740.3 MB). Peak memory consumption was 598.7 MB. Max. memory is 16.0 GB. [2020-11-11 14:56:50,125 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 308.3 MB. Free memory was 279.6 MB in the beginning and 279.6 MB in the end (delta: 76.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 709.02 ms. Allocated memory is still 308.3 MB. Free memory was 281.5 MB in the beginning and 283.3 MB in the end (delta: -1.8 MB). Peak memory consumption was 30.1 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 47.06 ms. Allocated memory is still 308.3 MB. Free memory was 283.3 MB in the beginning and 281.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 30.00 ms. Allocated memory is still 308.3 MB. Free memory was 281.8 MB in the beginning and 280.8 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 457.95 ms. Allocated memory is still 308.3 MB. Free memory was 280.8 MB in the beginning and 259.8 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. * TraceAbstraction took 837031.00 ms. Allocated memory was 308.3 MB in the beginning and 1.0 GB in the end (delta: 734.0 MB). Free memory was 258.7 MB in the beginning and 999.1 MB in the end (delta: -740.3 MB). Peak memory consumption was 598.7 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 12]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 12). Cancelled while BasicCegarLoop was constructing difference of abstraction (5128states) and FLOYD_HOARE automaton (currently 10 states, 23 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 24 for 79ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 836.8s, OverallIterations: 141, TraceHistogramMax: 6, AutomataDifference: 689.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.2s, HoareTripleCheckerStatistics: 12559 SDtfs, 114129 SDslu, 151685 SDs, 0 SdLazy, 26244 SolverSat, 9131 SolverUnsat, 185 SolverUnknown, 0 SolverNotchecked, 377.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12284 GetRequests, 6627 SyntacticMatches, 24 SemanticMatches, 5632 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 75304 ImplicationChecksByTransitivity, 353.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5289occurred in iteration=91, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 12.2s AutomataMinimizationTime, 140 MinimizatonAttempts, 318671 StatesRemovedByMinimization, 140 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.4s SsaConstructionTime, 3.7s SatisfiabilityAnalysisTime, 94.5s InterpolantComputationTime, 15549 NumberOfCodeBlocks, 15549 NumberOfCodeBlocksAsserted, 525 NumberOfCheckSat, 15274 ConstructedInterpolants, 8 QuantifiedInterpolants, 7083267 SizeOfPredicates, 548 NumberOfNonLiveVariables, 18572 ConjunctsInSsa, 1742 ConjunctsInUnsatCore, 275 InterpolantComputations, 7 PerfectInterpolantSequences, 0/5892 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown